Math Games

Grade 4 - Number

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

Included Skills:

Describe and apply mental mathematics strategies, such as
• skip-counting from a known fact
• using halving/doubling
• using doubling and adding one more group
• using patterns in the 9s facts
• using repeated doubling to develop an understanding of basic multiplication facts to 9 × 9 and related division facts.

• Provide examples for applying mental mathematics strategies:
- skip-counting from a known fact (e.g., for 6 x 3, think 5 x 3 = 15, then 15 + 3 = 18)
- halving/doubling (e.g., for 4 × 3, think 2 × 6 = 12)
- using a known double and adding one more group (e.g., for 3 x 7, think 2 x 7 = 14, then 14 + 7 = 21)
- repeated doubling (e.g., for 4 x 6, think 2 x 6 = 12 and 2 x 12 = 24)
- 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., for 30 ÷ 6, think 15 ÷ 3 = 5)
- relating division to multiplication (e.g., for 64 ÷ 8, think 8 × o = 64)