Which equation below does not belong in the fact family with the others?

• 10 × 5 = 50

• 5 × 10 = 50

• 50 ÷ 10 = 5

• 50 ÷ 2 = 25

What is the product of 8 and 7?

• 56

• 64

• 65

• 87

Alicia wants to buy some books for her home. She wants to put 8 books on each of the 9 shelves in her living room. How many books will she need to purchase?

• 76

• 72

• 71

• 62

Which set of numbers below has a product of about 3,600?

• 23 and 208

• 18 and 216

• 29 and 124

• 14 and 198

Which of the following is the best estimate for the product of 32 and 776?

• Between 18,000 and 22,000

• Between 24,000 and 28,000

• Between 28,000 and 32,000

• Between 32,000 and 36,000

Which of the following is the best estimate for 1,216 ÷ 39?

• The quotient can be estimated as 60 because 1,216 can be rounded to 1,200 and 39 can be rounded to 20, and 1,200 ÷ 20 = 60.

• The quotient can be estimated as 25 because 1,216 can be rounded to 1,000 and 39 can be rounded to 40, and 1,000 ÷ 40 = 25.

• The quotient can be estimated as 40 because 1,216 can be rounded to 1,200 and 39 can be rounded to 30, and 1,200 ÷ 30 = 40.

• The quotient can be estimated as 30 because 1,216 can be rounded to 1,200 and 39 can be rounded to 40, and 1,200 ÷ 40 = 30.

Which of the following is the best estimate for 5,834 ÷ 67?

• Between 50 and 60

• Between 60 and 70

• Between 70 and 80

• Between 80 and 90

Which set of numbers below has a quotient of about 70?

• 2,344 and 32

• 3,648 and 41

• 4,772 and 53

• 3,852 and 64

Which of these statements best estimates the product of 77 and 265?

• The product is smaller than 14,000 because 77 × 265 is smaller than 70 × 200 = 14,000.

• The product is bigger than 18,900 because 77 × 265 is bigger 80 × 300 = 24,000.

• The product is between 21,600 and 24,000 because 77 × 265 is bigger than 80 × 270 = 21,600 but smaller than 80 × 300 = 24,000.

• The product is between 18,200 and 21,600 because 77 × 265 is bigger than 70 × 260 = 18,200 but smaller than 80 × 270 = 21,600.

Which of the following is the best estimate when 792 is multiplied by 88?

• The product can be estimated as 56,000 because 792 can be rounded to 700 and 88 can be rounded to 80, and 700 × 80 = 56,000.

• The product can be estimated as 63,000 because 792 can be rounded to 700 and 88 can be rounded to 90, and 700 × 90 = 63,000.

• The product can be estimated as 72,000 because 792 can be rounded to 800 and 88 can be rounded to 90, and 800 × 90 = 72,000.

• The product can be estimated as 64,000 because 792 can be rounded to 800 and 88 can be rounded to 80, and 800 × 80 = 64,000.