Math Games

Demonstrate an understanding of central tendency and range by:
• determining the measures of central tendency (mean, median, mode) and range
• determining the most appropriate measures of central tendency to report findings.

• Achievement Indicators
- Determine mean, median and mode for a given set of data, and explain why these values may be the same or different.
- Determine the range of given sets of data.
- Provide a context in which the mean, median or mode is the most appropriate measure of central tendency to use when reporting findings.
- Solve a given problem involving the measures of central tendency.

Determine the effect on the mean, median and mode when an outlier is included in a data set.
• Achievement Indicators
- Analyze a given set of data to identify any outliers.
- Explain the effect of outliers on the measures of central tendency for a given data set.
- Identify outliers in a given set of data and justify whether or not they are to be included in the reporting of the measures of central tendency.
- Provide examples of situations in which outliers would and would not be used in reporting the measures of central tendency.

Construct, label and interpret circle graphs to solve problems.
• Achievement Indicators
- Identify common attributes of circle graphs, such as:
• title, label or legend
• the sum of the central angles is 360°
• the data is reported as a percent of the total and the sum of the percents is equal to 100%.
- Create and label a circle graph, with and without technology, to display a given set of data.
- Find and compare circle graphs in a variety of print and electronic media, such as newspapers, magazines and the Internet.
- Translate percentages displayed in a circle graph into quantities to solve a given problem.
- Interpret a given circle graph to answer questions.

Express probabilities as ratios, fractions and percents.
• Achievement Indicators
- Determine the probability of a given outcome occurring for a given probability experiment, and express it as a ratio, fraction and percent.
- Provide an example of an event with a probability of 0 or 0% (impossible) and an event with a probability of 1 or 100% (certain).

Identify the sample space (where the combined sample space has 36 or fewer elements) for a probability experiment involving two independent events.
• Achievement Indicators
- Provide an example of two independent events, such as:
• spinning a four section spinner and an eight-sided die
• tossing a coin and rolling a twelve-sided die
• tossing two coins
• rolling two dice
and explain why they are independent.
- Identify the sample space (all possible outcomes) for each of two independent events using a tree diagram, table or another graphic organizer.

Conduct a probability experiment to compare the theoretical probability (determined using a tree diagram, table or another graphic organizer) and experimental probability of two independent events.
• Achievement Indicators
- Determine the theoretical probability of a given outcome involving two independent events.
- Conduct a probability experiment for an outcome involving two independent events, with and without technology, to compare the experimental probability to the theoretical probability.
- Solve a given probability problem involving two independent events

Demonstrate an understanding of oral and written patterns and their equivalent linear relations.
• Achievement Indicators
- Formulate a linear relation to represent the relationship in a given oral or written pattern.
- Provide a context for a given linear relation that represents a pattern.
- Represent a pattern in the environment using a linear relation.

Create a table of values from a linear relation, graph the table of values, and analyze the graph to draw conclusions and solve problems.
• Achievement Indicators
- Create a table of values for a given linear relation by substituting values for the variable.
- Create a table of values using a linear relation and graph the table of values (limited to discrete elements).
- Sketch the graph from a table of values created for a given linear relation and describe the patterns found in the graph to draw conclusions, e.g., graph the relationship between n and 2n + 3.
- Describe the relationship shown on a graph using everyday language in spoken or written form to solve problems.
- Match a given set of linear relations to a given set of graphs.
- Match a given set of graphs to a given set of linear relations.

Demonstrate an understanding of preservation of equality by:
• modelling preservation of equality, concretely, pictorially and symbolically
• applying preservation of equality to solve equations.

• Achievement Indicators
- Model the preservation of equality for each of the four operations using concrete materials or using pictorial representations, explain the process orally and record it symbolically.
- Solve a given problem by applying preservation of equality.

Explain the difference between an expression and an equation.
• Achievement Indicators
- Identify and provide an example of a constant term, a numerical coefficient and a variable in an expression and an equation.
- Explain what a variable is and how it is used in a given expression.
- Provide an example of an expression and an equation, and explain how they are similar and different.

Evaluate an expression given the value of the variable(s).
• Achievement Indicators
- Substitute a value for an unknown in a given expression and evaluate the expression.

Model and solve problems that can be represented by one-step linear equations of the form x + a = b, concretely, pictorially and symbolically, where a and b are integers.
• Achievement Indicators
- Represent a given problem with a linear equation and solve the equation using concrete models, e.g., counters, integer tiles.
- Draw a visual representation of the steps required to solve a given linear equation.
- Solve a given problem using a linear equation.
- Verify the solution to a given linear equation using concrete materials and diagrams.
- Substitute a possible solution for the variable in a given linear equation into the original linear equation to verify the equality.

Model and solve problems that can be represented by linear equations of the form:
• ax + b = c
• ax = b
• x/a = b, a ≠ 0
concretely, pictorially and symbolically, where a, b and c are whole numbers.

• Achievement Indicators
- Model a given problem with a linear equation and solve the equation using concrete models, e.g., counters, integer tiles.
- Draw a visual representation of the steps used to solve a given linear equation.
- Solve a given problem using a linear equation and record the process.
- Verify the solution to a given linear equation using concrete materials and diagrams.
- Substitute a possible solution for the variable in a given linear equation into the original linear equation to verify the equality.

Demonstrate an understanding of circles by:
• describing the relationships among radius, diameter and circumference of circles
• relating circumference to pi
• determining the sum of the central angles
• constructing circles with a given radius or diameter
• solving problems involving the radii, diameters and circumferences of circles.

• Achievement Indicators
- Illustrate and explain that the diameter is twice the radius in a given circle.
- Illustrate and explain that the circumference is approximately three times the diameter in a given circle.
- Explain that, for all circles, pi is the ratio of the circumference to the diameter (C/d), and its value is approximately 3.14.
- Explain, using an illustration, that the sum of the central angles of a circle is 360°.
- Draw a circle with a given radius or diameter with and without a compass.
- Solve a given contextual problem involving circles.

Develop and apply a formula for determining the area of:
• triangles
• parallelograms
• circles.

• Achievement Indicators
- Illustrate and explain how the area of a rectangle can be used to determine the area of a triangle.
- Generalize a rule to create a formula for determining the area of triangles.
- Illustrate and explain how the area of a rectangle can be used to determine the area of a parallelogram.
- Generalize a rule to create a formula for determining the area of parallelograms.
- Illustrate and explain how to estimate the area of a circle without the use of a formula.
- Apply a formula for determining the area of a given circle.
- Solve a given problem involving the area of triangles, parallelograms and/or circles.

Perform geometric constructions, including:
• perpendicular line segments
• parallel line segments
• perpendicular bisectors
• angle bisectors.

• Achievement Indicators
- Describe examples of parallel line segments, perpendicular line segments, perpendicular bisectors and angle bisectors in the environment.
- Identify line segments on a given diagram that are parallel or perpendicular.
- Draw a line segment perpendicular to another line segment and explain why they are perpendicular.
- Draw a line segment parallel to another line segment and explain why they are parallel.
- Draw the bisector of a given angle using more than one method and verify that the resulting angles are equal.
- Draw the perpendicular bisector of a line segment using more than one method and verify the construction.

Identify and plot points in the four quadrants of a Cartesian plane using integral ordered pairs.
• Achievement Indicators
- Label the axes of a four quadrant Cartesian plane and identify the origin.
- Identify the location of a given point in any quadrant of a Cartesian plane using an integral ordered pair.
- Plot the point corresponding to a given integral ordered pair on a Cartesian plane with units of 1, 2, 5 or 10 on its axes.
- Draw shapes and designs, using given integral ordered pairs, in a Cartesian plane.
- Create shapes and designs, and identify the points used to produce the shapes and designs in any quadrant of a Cartesian plane.

Perform and describe transformations (translations, rotations or reflections) of a 2-D shape in all four quadrants of a Cartesian plane (limited to integral number vertices).
• Achievement Indicators
(It is intended that the original shape and its image have vertices with integral coordinates.)
- Identify the coordinates of the vertices of a given 2-D shape on a Cartesian plane.
- Describe the horizontal and vertical movement required to move from a given point to another point on a Cartesian plane.
- Describe the positional change of the vertices of a given 2-D shape to the corresponding vertices of its image as a result of a transformation or successive transformations on a Cartesian plane.
- Determine the distance between points along horizontal and vertical lines in a Cartesian plane.
- Perform a transformation or consecutive transformations on a given 2-D shape and identify coordinates of the vertices of the image.
- Describe the positional change of the vertices of a 2-D shape to the corresponding vertices of its image as a result of a transformation or a combination of successive transformations.
- Describe the image resulting from the transformation of a given 2-D shape on a Cartesian plane by identifying the coordinates of the vertices of the image.

Determine and explain why a number is divisible by 2, 3, 4, 5, 6, 8, 9 or 10, and why a number cannot be divided by 0.
• Achievement Indicators
- Determine if a given number is divisible by 2, 3, 4, 5, 6, 8, 9 or 10 and explain why.
- Sort a given set of numbers based upon their divisibility using organizers, such as Venn and Carroll diagrams.
- Determine the factors of a given number using the divisibility rules.
- Explain, using an example, why numbers cannot be divided by 0.

Demonstrate an understanding of the addition, subtraction, multiplication and division of decimals (for more than 1-digit divisors or 2-digit multipliers, the use of technology is expected) to solve problems.
• Achievement Indicators
- Solve a given problem involving the addition of two or more decimal numbers.
- Solve a given problem involving the subtraction of decimal numbers.
- Solve a given problem involving the multiplication of decimal numbers.
- Solve a given problem involving the multiplication or division of decimal numbers with 2- digit multipliers or 1-digit divisors (whole numbers or decimals) without the use of technology.
- Solve a given problem involving the multiplication or division of decimal numbers with more than a 2-digit multiplier or 1-digit divisor (whole number or decimal), with the use of technology.
- Place the decimal in a sum or difference using front-end estimation, e.g., for 4.5 + 0.73 + 256.458, think 4 + 256, so the sum is greater than 260.
- Place the decimal in a product using front-end estimation, e.g., for $12.33 × 2.4, think $12 × 2, so the product is greater than $24.
- Place the decimal in a quotient using front-end estimation, e.g., for 51.50 m ÷ 2.1, think 50 m ÷ 2, so the quotient is approximately 25 m.
- Check the reasonableness of solutions using estimation.
- Solve a given problem that involves operations on decimals (limited to thousandths) taking into consideration the order of operations.

Solve problems involving percents from 1% to 100%.
• Achievement Indicators
- Express a given percent as a decimal or fraction.
- Solve a given problem that involves finding a percent.
- Determine the answer to a given percent problem where the answer requires rounding and explain why an approximate answer is needed, e.g., total cost including taxes.

Demonstrate an understanding of the relationship between positive repeating decimals and positive fractions, and positive terminating decimals and positive fractions.
• Achievement Indicators
- Predict the decimal representation of a given fraction using patterns, e.g., 1/11 = 0.09, 2/11 = 0.18, 3/11 = ? ...
- Match a given set of fractions to their decimal representations.
- Sort a given set of fractions as repeating or terminating decimals.
- Express a given fraction as a terminating or repeating decimal.
- Express a given repeating decimal as a fraction.
- Express a given terminating decimal as a fraction.
- Provide an example where the decimal representation of a fraction is an approximation of its exact value.

Demonstrate an understanding of adding and subtracting positive fractions and mixed numbers, with like and unlike denominators, concretely, pictorially and symbolically (limited to positive sums and differences).
• Achievement Indicators
- Model addition and subtraction of a given positive fraction or a given mixed number using concrete representations, and record symbolically.
- Determine the sum of two given positive fractions or mixed numbers with like denominators.
- Determine the difference of two given positive fractions or mixed numbers with like denominators.
- Determine a common denominator for a given set of positive fractions or mixed numbers.
- Determine the sum of two given positive fractions or mixed numbers with unlike denominators.
- Determine the difference of two given positive fractions or mixed numbers with unlike denominators.
- Simplify a given positive fraction or mixed number by identifying the common factor between the numerator and denominator.
- Simplify the solution to a given problem involving the sum or difference of two positive fractions or mixed numbers.
- Solve a given problem involving the addition or subtraction of positive fractions or mixed numbers and determine if the solution is reasonable.

Demonstrate an understanding of addition and subtraction of integers, concretely, pictorially and symbolically.
• Achievement Indicators
- Explain, using concrete materials such as integer tiles and diagrams, that the sum of opposite integers is zero.
- Illustrate, using a number line, the results of adding or subtracting negative and positive integers, e.g., a move in one direction followed by an equivalent move in the opposite direction results in no net change in position.
- Add two given integers using concrete materials or pictorial representations and record the process symbolically.
- Subtract two given integers using concrete materials or pictorial representations and record the process symbolically.
- Solve a given problem involving the addition and subtraction of integers.

Compare and order positive fractions, positive decimals (to thousandths) and whole numbers by using:
• benchmarks
• place value
• equivalent fractions and/or decimals.

• Achievement Indicators
- Order the numbers of a given set that includes positive fractions, positive decimals and/or whole numbers in ascending or descending order, and verify the result using a variety of strategies.
- Identify a number that would be between two given numbers in an ordered sequence or on a number line.
- Identify incorrectly placed numbers in an ordered sequence or on a number line.
- Position fractions with like and unlike denominators from a given set on a number line and explain strategies used to determine order.
- Order the numbers of a given set by placing them on a number line that contains benchmarks, such as 0 and 1 or 0 and 5.
- Position a given set of positive fractions, including mixed numbers and improper fractions, on a number line and explain strategies used to determine position.