Math Games

Grade 4 - Number

Standard 4.N.5 - Practice division word problems with divisors up to 10.

Included Skills:

Describe and apply mental mathematics strategies, such as:
• skip counting from a known fact
• using doubling or halving
• using doubling or halving and adding or subtracting one more group
• using patterns in the 9s facts
• using repeated doubling
to determine basic multiplication facts to 9 × 9 and related division facts.

• Achievement Indicators
- Provide examples for applying mental mathematics strategies:
• doubling, e.g., for 4 × 3, think 2 × 3 = 6, and 4 × 3 = 6 + 6
• doubling and adding one more group, e.g., for 3 × 7, think 2 × 7 = 14, and 14 + 7 = 21
• use ten facts when multiplying by 9, e.g., for 9 × 6, think 10 × 6 = 60, and 60 – 6 = 54; for 7 × 9, think 7 × 10 = 70, and 70 – 7 = 63
• halving, e.g., if 4 × 6 is equal to 24, then 2 × 6 is equal to 12
• relating division to multiplication, e.g., for 64 ÷ 8, think 8 × †? = 64.