Math Games

Grade 4 - Number

Standard 4.N.3 - Practice applying specific properties of multiplication to solve an equation.

Included Skills:

Demonstrate an understanding of multiplication of whole numbers (limited to numbers less than or equal to 10) by: applying mental mathematics strategies, explaining the results of multiplying by 0 and 1
• Explain the strategy used to determine a product.
• Explain the strategy used in a given solution to a product. For example:
- for 4 x 3, thinking 2 x 3 = 6 and 4 x 3 = 6 + 6 or 6 + 2 = 12 (halving and doubling)
- for 3 x 7 think 2 x 7 = 14 and 14 + 7 = 21 (doubling and adding one more group)
- for 9 x 6, think 10 x 6 = 60 and 60 - 6 = 54 (multiplying by ten and subtracting one group)
- knowing 2 x 6 = 12, then 4 x 6 = 12 x 2 = 24 (doubling)
- for 64 ÷ 8, think 8 x ? = 64 (relating division to multiplication)
- for 8 x 5, knowing that 5 x 5 = 25, and then skip counting by 5 three times to get 25 + 5 + 5 + 5 = 40.
• Explain the property for determining the answer when multiplying numbers by one.
• Explain the property for determining the answer when multiplying numbers by zero.