Quiz Multiply and Divide Integers

Which expression is represented on the number line?

• 0 · (-8)

• -2 · 4

• 2 · (-8)

Answer explanation

The expression -2 · 4 equals -8, which is represented on the number line. The other options yield different results: 0, -8, and -16, making -2 · 4 the correct choice.

Which expression is represented on the number line?

• -12 ÷ -3

• 0 – (-12)

• -3 · –4

• 3 · (-4)

Jamie is counting the coins from her piggy bank. To do that, she stacks the nickels in groups of 10 as shown below. Which of the following expressions BEST represents how Jamie can use the model above to find her total number of nickels?

• 5 × 6

• 5 × 10

• 6 × 6

• 6 × 10

Answer explanation

Jamie stacks her nickels in groups of 10. If there are 6 stacks, the total number of nickels is represented by 6 (stacks) × 10 (nickels per stack), making 6 × 10 the best expression for her total.

Jake’s family is traveling 1,836 miles from Chicago to Las Vegas. If they average 204 miles per day, how many days should it take Jake’s family to make the trip?

• 1,836 (204) =374,544

Answer explanation

To find the number of days for the trip, divide the total miles by the average miles per day: 1,836 ÷ 204 = 9. Therefore, it should take Jake's family 9 days to make the trip.

Jared ordered 18 dozen cookies for refreshments for a school dance. How many cookies did he order?

• 106

• 116

• 206

• 216

Answer explanation

Jared ordered 18 dozen cookies. Since 1 dozen equals 12 cookies, he ordered 18 x 12 = 216 cookies. Therefore, the correct answer is 216.

The water level dropped three inches every week for four weeks. By how much did the water level change?

A checking account is overdrawn by $10 on both Friday and Saturday. By how much was the account overdrawn?

Answer explanation

The account is overdrawn by -$10 on both Friday and Saturday. Therefore, the total overdrawn amount is -$10 (2) = - $20.

2 · (-8)

Answer explanation

To solve 2 · (-8), multiply 2 by -8. The product of a positive and a negative number is negative. Thus, 2 · (-8) = -16.

Ashley and her sister decide to split the cost of dinner, which is $14. How much will each sister pay?

Answer explanation

To find out how much each sister pays, divide the total cost of dinner, $14, by 2. So, $14 ÷ 2 = $7. Therefore, each sister will pay $7.

Answer explanation

To solve -20 + 4, start at -20 on the number line and move 4 units to the right. This results in -16. Therefore, the answer is -16.