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Each game has 10 questions.

Green box means correct.

Yellow box means incorrect.

Unlock harder levels by getting an average of 80% or higher.

Earn up to 5 stars for each level

The more questions you answer correctly, the more stars you'll unlock!

Each game has 10 questions.

Green box means correct.

Yellow box means incorrect.

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Grade 5 - Number

Standard 5.N.2 - Round numbers up to 5000.

Included Skills:

Use estimation strategies including:

• front-end rounding

• compensation

• compatible numbers

in problem-solving contexts.

• Achievement Indicators

- Provide a context for when estimation is used to:

• make predictions

• check reasonableness of an answer

• determine approximate answers.

- Describe contexts in which overestimating is important.

- Determine the approximate solution to a given problem not requiring an exact answer.

- Estimate a sum or product using compatible numbers.

- Estimate the solution to a given problem using compensation and explain the reason for compensation.

- Select and use an estimation strategy for a given problem.

- Apply front-end rounding to estimate:

• sums, e.g., 253 + 615 is more than 200 + 600 = 800

• differences, e.g., 974 – 250 is close to 900 – 200 = 700

• products, e.g., the product of 23 × 24 is greater than 20 × 20 (400) and less than 25 × 25 (625)

• quotients, e.g., the quotient of 831 ÷ 4 is greater than 800 ÷ 4 (200).

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