Grade 4 - Progress in Mathematics

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Strategy: Use More Than One Step

Tina, Maya, and Olga need to collect 200

aluminum cans to win a recycling contest. Tina

has collected 57 cans, Maya has collected 76

cans, and Olga has collected 64 cans. How many

more cans do the girls still need to collect?

Use addition to check your answer.

197 
 3  200

cans cans cans

collected still needed in all

First find the number of cans collected. Add.

57 
 76 
 64 

Tina’s Maya’s Olga’s number

cans cans cans collected

Then find the number of cans the girls still need

to collect. Subtract the sum from 200.

200 

in number number

all collected still needed

??

?

Visualize yourself in the problem as you

reread it. Focus on the facts and questions.

Facts: 200 cans needed.

Tina collected 57 cans.

Maya collected 76 cans.

Olga collected 64 cans.

Question: How many more cans are still needed?

57 
 76 
 64  197

The girls collected 197 cans.

200  197  3

The girls need to collect 3 more cans.

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