Adding, Subtracting, Multiplying, and Dividing Decimals in Word Problems

When ​ (a)   decimals, I must always ​ (b)   the decimals.

• adding or subtracting

• line up

• multiplying or dividing

• get rid of

What is the rule for adding or subtracting decimals?

• Add first

• Line up the decimals first, then fill in with zeros.

• Move the decimal to the right the total amount of numbers after the decimal.

• Subtract

Where does the decimal go in this product?

7.8 x 3.2

• 24.96

• 2.496

• 249.6

• 0.2496

What is the first step in this problem?

• Divide 9 by 8

• Move the decimal place 1 place to the left in the divisor and dividend.

• Move the decimal place 1 place to the right in the divisor and dividend.

7.3B

• A

• B

• C

• D

7.3B

• A

• B

• C

• D

Mrs. Bentley took her two nieces to the zoo this past weekend. They bought two child tickets that cost $5.99 each, an adult ticket that cost $12.99, three lunches that cost $7.49 each and 3 waters that cost $4 each. If Mrs. Bentley brought a $100 bill, how much change did she receive?

• 40.56

• 59.44

• 41.44

• 100.00

Every week Joshua runs 2.1 miles on Monday, 3.1 miles on Wednesday, 4.05 miles on Thursday, and 2.65 miles on Friday. How many total miles will he run in a week?

• 11.2

• 11.9

• 19.1

• 12.6

John ate some snacks with a total of 80.79 calories. If the chips he ate were 43.39 calories, how many calories were in the rest of his snack?

• 124.08 calories

• 124.08 chips

• 37.4 chips

• 37.4 calories

One ticket to a high school football game is $5.50. there are six home games each season. How much would it cost a family of four to attend all of the home games this season?

• $33.00

• $3.30

• $22.00

• $132.00