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Answer Key
Grade 3 Math: Estimation in Problem Solving
1.
find an approximate answer that is close enough
2.
50
3.
40
4.
400
5.
300
6.
80 (50+30)
7.
600 (400+200)
8.
Yes — close to 49
9.
80
10.
100
11.
80
12.
50
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