Sum
Difference
Compose/Decompose
Real World 1
Estimate
100

0.598+0.346

0.944

100

0.8-0.326

0.474

100

Which of the following the correct way to find 35.76 + 14.53? Choose all that apply.

A) 3+1+5+4+7+5+6+3

B) 3+1+5+4+0.7+0.5+0.6+0.3

C) 30+10+5+4+0.7+0.5+0.06+0.03

D) 35+14+0.76+0.53

C, D

100

Jenny has a recipe that calls for 9.84 ounces of milk and 6.635 ounces of chicken broth. How many ounces of liquid does Jenny need for the recipe?

16.475 ounces

100

Define "estimate" in your own words.

an approximate calculation

200

9.865+4.307

14.172

200

0.67-0.085

0.585

200

Decompose 6.548

A) 6+0.5+0.04+0.008

B) 6+5+4+8

C) 6+0.5+0.4+0.8

D) 6+0.54+0.08

A

200

At the jumping event, Bill's first height that he cleared was 2.895 meters. The second height he cleared was 3.206 meters. How much higher was the second height that Bill cleared?

0.311 meter

200

Where Richard lives, the average high temperature in March is 53.77 degrees F. The average low temperature in March is 42.13 degrees F. Which equation best estimates the difference between the average high and low temperatures in March?

A) 54-42=12

B) 53-43=10

C) 53-42=11

D) 54-43=11

A

300

0.04+0.603

0.643

300

23.895-19.292

4.603

300

How can you decompose the number 0.731

A) 0.7+0.003+0.01

B) 0.7+0.3+0.1

C) 7+3+1

D) 0.7+0.03+0.001

D

300

Janice makes 2.4 liters of iced tea. After serving the iced tea to her guests, she has 0.29 liter left. How many liters of iced tea did Janice serve to her guests?

2.11 liters

300

Mindy rode 12.38 miles yesterday. She rode 11.195 miles today. About how many miles did she ride both days?

About 23 miles.

400

107.2+58.9

166.1

400

3.179-2.479=

0.7

400

Jack needs to run a total of 4 miles on the weekend. He runs 2.075 miles on Saturday. How far does he need to run on Sunday? Show how to use decomposition to subtract.

1.925 miles; 

4-2=2 

2-0.07=1.93 

1.93-0.005= 1.925

400

Alex buys two watermelons. One of the watermelons weighs 4.579 pounds. The second watermelon weighs 3.82 pounds. What is the combined weight of the two watermelons?

8.399 pounds

400

A new crayon is 14.822 centimeters long. A crayon that Rhonda has been using is now 5.739 centimeters long. About how much longer is the new crayon?

About 9 centimeters

500

0.153+0.144

0.297

500

75.550-28.426

47.124

500

Zoe buys two items at the store. She spends a total of 61.25. One item costs $35.92. What is the cost of the second item? Which strategy did you use to solve?

$25.33

500

Judy has two lengths of string. One of the strings is 12.74 centimeters long. The second length of string is 17.52 centimeters long. Judy ties the two pieces of string together. What is the length of the string? What strategy did you use?

30.26 centimeters

500

The fifth grade class paints a mural that covers 35.2 square feet. The fourth-grade class paints a mural that covers 27.676 square feet. How much more wall space does the mural painted by the fifth-grade class cover? Which strategy did you use to solve?

7.524 square feet