Math
Unit 10
Review
100

How can you decompose the number 387 in the equation below?

495 - 387 = ?

495 - 387 = ?

A. 3 + 8 + 7 

B. 300 + 8 + 7

C. 300 + 80 + 7

D. 38 + 7

C. 300 + 80 + 7

100

How can you decompose the number 157 in the equation below?

246 - 157 = ?

A. 15 + 7 

B. 10 + 50 + 7

C. 1 + 5 + 7

D. 100 + 50 + 7

D. 100 + 50 + 7

100

How can you decompose the number 331 in the equation below?

678 - 331 = ?

A. 300 + 3 + 1 

B. 33 + 1

C. 300 + 30 + 1

D. 3 + 3 + 1

C. 300 + 30 + 1

400

Techy made 647 robot cupcakes for his friends. His friends ate 458 robot cupcakes. 

How many cupcakes are left? 

647 - 458 = 189

400
Mrs. Byers had 249 dry erase markers at the beginning of the year. Her class lost 123 markers. 


How many markers are left? 

249 - 123 = 126

400

Techy had 925 Techy Tickets to give to students who were listening. 276 student received Techy Tickets.

How many Techy Tickets were left?

925 - 276 = 649

500

Amelia wants to practice for her recital for 235 minutes.  

She practices 127 minutes.  

  • How many more minutes does Amelia need to practice?

  • Show your solution path using words, pictures or models. 

235 - 127 = 108

Amelia need to practice 108 more minutes. 

What strategy did you use?

500

Liam wants to practice baseball for 140 minutes.  

He practices 85 minutes.  

  • How many more minutes does Liam need to practice?

  • Show your solution path using words, pictures or models.

140 - 85 = 55

Lian need to practice 55 minutes. 

What strategy did you use? 

500

Grayson wants to read for 500 minutes.  

He read 359 minutes.  

  • How many more minutes does Grayson need to practice?

Show your solution path using words, pictures or models. 

500 - 359 = 141

Grayson needs to read for 141 more minutes. 

What strategy did you use? 

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