Expanded Form
Standard Algorithm
Missing or Extra Info
Rounding
Compatible Numbers
100

5x12

What is 60

100

12x9

What is 108

100

Kiara wants to decorate her rectangular art room. She wants to add a rectangular frame to her wall. If the frame is 3ft. long, what is its perimeter? 

What is missing information
100

12x3

What is 30

100

Define compatible numbers

What is: numbers that are easy to compute

200

4x16

What is 64
200

64x5

What is 320

200

Corbin has a goal of reading all 100 books in his favorite book series. Each book costs $10. Corbin can read 1 book in 3 weeks. How many weeks will it take Corbin to finish the series?

What is 300 weeks (extra info)

200

24x7

What is 140

200

What is a compatible number for 24

What is 25

300

6x24

144

300

120x4

What is 480

300

A sturdy dog crate weighs 28 pounds. It costs $68. Calista has 3 dogs. How much money will she spend on dog crates if she buys one for each of her dogs. 

What is $204 (extra info)

300

23x43

What is 800
300

What is a compatible number for 47

What is 50

400

7x18

What is 126

400

123x7

What is 861

400

Samantha has 12 flower vases. She has 3 yellow, 3 red, 3 purple, and 3 orange vases. Samantha would like to put an even amount of vases on each table. How many vases should she put on each table?

What is missing information

400

43x55

What is 2,400

400

What would the compatible numbers of 24x3 be

What is: 25x5

500

9x28

What is 252

500

1748x5

What is 8,740

500

Noah made 12 batches of cookies. Each batch made 14 cookies. Of the 12 batches, he had an even amount of chocolate chip, snickerdoodle, and oatmeal cookies. How many batches of each cookie flavor are there?

What is 3 of each kind

500

66x89

6,300

500

32x47

What is: 1,500 (30x50)