Mastering Multiplication of Whole Numbers

What does multiplying whole numbers help you find?

• The total

• The quotient

• The difference

• The remainder

If you have 5 groups with 6 in each group, what is the total?

• 35

• 11

• 25

• 30

What is the first step in breaking down the factor 38?

• Subtract 10 from it

• Divide it by 2

• Break it into tens and ones

• Multiply it by 10

What is 15 times 30?

• 300

• 600

• 450

• 150

What is the product of 15 times 38?

• 570

• 450

• 380

• 190

What is 38 times 10?

• 450

• 190

• 380

• 570

What is the value of the digit 3 in the number 30?

• 3

• 30

• 300

• 3000

What is the first step in the standard algorithm for multiplying 145 by 39?

• Multiply 145 by 9

• Subtract the smaller number

• Multiply 145 by 30

• Add the partial products

What do you do after multiplying 145 by 9 in the standard algorithm?

• Divide the total by 2

• Subtract the results

• Multiply 145 by 30

• Add the partial products

What is the final product of 145 times 39?

• 6000

• 5655

• 4500

• 5700