Unit 3 Decimal Operation

Add Decimals

100

Find the sum 

1.23 + 2.10 =

1.23 + 2.10 = 3.33

200

Jonathan spent $3.12, Maya spent $6.27, and Charlotte spent $4.36 at the store. How much did they spend altogether? 

They spent $13.75 altogether. 

300

Add. 

3.2 + 8.12 =

3.2 + 8.12 = 11.32

400

Dylan and Sareen did some black friday shopping. Dylan got a brand new TV for $288.07. Sareen got a brand new scooter for $333.14. How much did they spend combined? 

$621.21

500

Whats the sum? 

Three and sixteen hundredths plus one hundred twenty-five thousandths. 

3.16 + .125 = 3.285

Subtract Decimal

100

Find the difference. 

6.47 - 3.25 =

6.47 - 3.25 = 3.22

200

There was a pumpkin pie. The pumpkin pie was cut into 10 equal slices. Jonathan ate .2 or the pie, Charlotte ate . 4, and Maya ate .1. How many pieces of the pie are left? 

MUST SHOW WITH A VISUAL. 

3 slices of pie are left.  

300

During a recent rainstorm, 3.36 centimeters of rain fell in Norwalk and 15.9 centimeters fell in Fairfield. How much more rain fell in Fairfield than in Norwalk? 

15.9 - 3.36 = 12.54

400

Charms went to Pet Smart at got a new sweater for $2.36 and some yogurt snacks for $10.67. Later, Crouton went and got two things of snacks, the first cost $3.78 and the second cost $ 6.90. Who spent more money? How much more did they spend? 

Charms spent: $2.36 + $10.67 = $13.03

Crouton spent: $ 3.78 + $6.90 = $10.68 

Charms spent more. 

13.03 - 10.68 = 2.35 

Charms spent 2.35 more than Crouton. 

500

Find the Difference. 

 $39.91 -  $14.85 =

 $39.91 -  $14.85 = $ 25.06

Multiply Decimals

100

Find the product. 

13.5 X 5.32 =

13.5 X 5.32 = 71.82

200

Roberto multiplied 5.1 x 36 and wrote 1,836 as his product. Is Roberto correct? 

He is NOT correct. He is forgetting to add back in the decimal. The correct answer is 183.6 NOT 1836. 

300

A large cheese pizza costs $11.99.
A medium cheese pizza costs $8.99. How much do 5 large and 3 medium pizzas cost?

 5 X 11.99 = $59.95

3 X 8.99 = $26.97

$59.95 + $26.97 = $86.92

400

Find the product. 

1.34 X 5.6 =

1.34 X 5.6 = 7.504

500

James bought 1.5 pounds of strawberries that cost $1.60 per pound at the farmer’s market.  Rupert bought 2.4 pounds of strawberries that cost $1.10 per pound at the grocery store.  Who spent more money? How much more did they spend?

James = 1.5 X $1.60 = $2.40

Rupert = 2.4 X $1.10 = $2.64

Rupert spent more. 

2.64 - 2.40 = .24

Rupert spent .24 cents more than James. 

Divide Decimals

100

Find the quotient. 

37.63 / 5.3 =

37.63 / 5.3 = 7.1

200

75.9 ÷ 3.3 =  

75.9 ÷ 3.3 =  23

300

Shelly is selling snow cones. She used 216.2 ounces of ice to make 47 snow cones. If she used an equal amount of ice in each one, how many ounces of ice are in each snow cone?

4.6 ounces of ice are in each snow cone. 

400

Four friends had a dinner party. They each paid $45.64. They split the cost evenly among them. How much did each girl pay?

$11.41

500

Hannah has a box of cookies that weighs 4.4 pound.  She separates the cookies into smaller boxes, each containing 0.4 pounds of cookies. How many smaller boxes will she make?

4.4 / .4 = 11 boxes