Grade 4 - Progress in Mathematics

Use simpler numbers to help choose the operation.

Use 12 for the 12
^78 
ft length.

Use 4 for the 4
^38 
ft length.

Add to find the amount of ribbon cut: 4 ft 4 ft 8 ft

Subtract to find the amount of ribbon left: 12 ft 8 ft 4 ft

Add the lengths of the pieces.

Do they equal 12
^78 
ft? 4 
^38 
 4 
^38 
 4 
^18 
 12 
^78 
 ✔

Visualize the facts of the problem

as you reread it.

Facts: 12 


7

8 
ft of ribbon

Tw o 4 
^38 
ft pieces cut from it

Question: Is there 4
^38 
ft left?

A piece of ribbon is 12
^78 
ft long. Kim cuts off two

pieces that are 4
^38 
ft each. Does she have enough

ribbon left to cut one more piece the same length?

Problem-Solving Strategy:

Use Simpler Numbers

9-11

Now use the same operations with the numbers in

the problem.

 4 


3

8 
ft ^12 

7

8 
ft

 4 


3

8 
ft ^8 

6

8 
ft

 8 
^68 
ft cut  4 
^18 
ft left

Compare: 4
^18 
 4 
^38 
. So Kim does nothave

enough ribbon to cut another piece of the same length.

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