Multiply Integers and Word Problems

When multiplying or dividing a NEGATIVE and NEGATIVE number your result will be...

• POSITIVE

• NEGATIVE

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

When multiplying or dividing a NEGATIVE and POSITIVE number your result will be...

• Positive

• Negative

Tags

CCSS.3.OA.D.9

What operation would you use to solve this problem?

If the temperature drops 5 degrees every hour for 9 hours, what is the change in temperature?

• Multiplication

• Division

Answer explanation

The temperature is dropping 5 degrees every hour for 9 hours. This is a repeated process.

-5 * 9 = -45

The temperature dropped 45 degrees.

Tags

CCSS.7.NS.A.3

What operation would you use to solve this problem?

The football team lost 8 yards on every play for 5 plays. What is the total change in yards?

• Multiplication

• Division

• 40 ÷ (-8) = -5

• 40 ÷ (-5) = -8

Answer explanation

Losing 8 yards is a -8. They do this 5 times.

-8 * 5= -40

The total change in yards is that the team lost 40 yards.

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What operation would you use to solve this problem?

A mountain climber climbed up a cliff 50 feet at a time. He did this 5 times in one day. What was the overall change in his elevation?

• Multiplication

• Division

Answer explanation

The climber is climbing 50 feet 5 times in one day.

50 * 5 = 250

His overall change in elevation was 250 feet. He climbed 250 feet.

Tags

CCSS.3.OA.D.8

What operation would you use to solve this problem?

Over a 6 week period, the price of a gallon of gas increased by 18 cents. If the price changed the same amount each week, what was the change per week?

• Multiplication

• Division

Answer explanation

18/6 = 3

Each week the price of gas increased by 3 cents.

We're trying to figure out 6 * _?_ = 18.

Tags

CCSS.3.OA.D.8

Flora made 3 withdrawals of $75 each from her bank account. This means she took out $75 from her account to spend. What was the overall change in her account?

• -$225

• $225

• -$25

• $25

Answer explanation

She took out $75 three times.

-75 * 3 = -225

She spent $225.

Tags

CCSS.7.EE.B.3

Kim was walking down a rocky path. For 4 minutes, the elevation dropped at the same rate. Altogether it dropped 8 feet. What was the change in elevation each minute?

• -8 ÷ 4 = -2 feet per minute

• 8 ÷ 4 = 2 feet per minute

Answer explanation

The elevation dropped. That is why the 8 is negative.

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

The temperature increased over 12 hours. Altogether it changed 24 degrees. What was the change in temperature each hour for the 12 hours?

• 2 degrees per hour

• -2 degrees per hour

Answer explanation

24/12 = 2

The temperature changed 2 degrees per hour.

We know that altogether (total) the temperature changed 24 degrees. We're trying to figure out:

12 * _?__ = 24

Tags

CCSS.7.EE.B.3

Marco measured the height of his snowman at the beginning of the week and again after 5 days. The change in height was -10 inches. How much did the snowman melt per day?

• 2 inches per day

• -2 inches per day

Answer explanation

-10/5 = -2

Tags

CCSS.7.EE.B.3