Exploring Mental Math Strategies for Multiplication

What does the commutative property of multiplication state?

• Changing the order of factors changes the product.

• Changing the grouping of factors changes the product.

• Changing the grouping of factors does not change the product.

• Changing the order of factors does not change the product.

How can the associative property of multiplication be described?

• Multiplying a difference by a number is the same as multiplying each subtrahend.

• Changing the order of factors changes the product.

• Changing the grouping of factors does not change the product.

• Multiplying a sum by a number is the same as multiplying each addend.

What is the result of using the commutative property on the equation 2 x 13 x 50?

• 2 x 50 x 13

• 13 x 2 x 50

• 50 x 2 x 13

• All of the above

How can you use the distributive property to simplify 4 x 325?

• 4 x (320 - 5)

• 4 x (300 - 25)

• 4 x (300 + 25)

• 4 x (320 + 5)

What is the result of 5 x 299 using the distributive property with subtraction?

• 5 x (290 + 9)

• 5 x (300 - 1)

• 5 x (290 - 9)

• 5 x (300 + 1)

What does halving and doubling mean in mental math?

• Cutting one factor in half and doubling the other factor.

• Doubling both factors.

• Cutting both factors in half.

• Doubling the product.

If 7 x 40 = 280, what is 14 x 20 using halving and doubling?

• 1120

• 140

• 560

• 280

How can you use the distributive property to solve 6 x 211?

• 6 x (210 - 1)

• 6 x (200 + 11)

• 6 x (220 - 9)

• 6 x (210 + 1)

What is the total cost for Mr. Lee and his four friends if each buys 10 ride tickets at $27 each?

• $270

• $540

• $135

• $405

Using the distributive property, how can you simplify 5 x 27?

• 5 x (20 - 7)

• 5 x (30 - 3)

• 5 x (30 + 3)

• 5 x (20 + 7)