Mastering Mental Math Strategies for Multiplication

What does the commutative property of multiplication state?

• Multiplication is the same as addition.

• Only even numbers can be multiplied.

• Factors must be multiplied in a specific order.

• Factors can be multiplied in any order to get the same product.

If you have 6 times 5 times 20, which order makes it easier to multiply?

• Multiply all at once

• 20 times 6 first, then multiply by 5

• 5 times 20 first, then multiply by 6

• 6 times 5 first, then multiply by 20

What does the associative property of multiplication allow you to do?

• Group factors in different ways to get the same product

• Multiply only two factors at a time

• Change the order of addition

• Divide numbers easily

Using the associative property, which is easier to multiply first in 6 times 4 times 25?

• 6 times 4

• Multiply all at once

• 6 times 25

• 4 times 25

How can the distributive property simplify 2 times 8?

• By breaking 8 into 5 plus 3

• By breaking 2 into 1 plus 1

• By adding 2 and 8

• By subtracting 2 from 8

What is the result of 4 times 625 using the distributive property?

• 2400

• 2500

• 2700

• 2600

How can you simplify 3 times 398 using the distributive property with subtraction?

• Think of 398 as 400 minus 2

• Think of 398 as 100 plus 298

• Think of 398 as 300 plus 98

• Think of 398 as 200 plus 198

What is the result of 3 times 398 using the distributive property with subtraction?

• 1194

• 1200

• 1212

• 1188

In having and doubling, what is 14 times 40 simplified to?

• 560

• 280

• 1120

• 1400

When adding with mental math, which place value should you start with?

• Hundreds

• Tens

• Ones

• Thousands