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Estimating Sums. 5 7 + 3 1. Actual answer. 5 7 5 7 + 3 1 + 3 1 8 8. Estimated answer. 5 7 6 0 + 3 1 +3 0 9 0. Your Turn! . Actual answer. 6 8 + 2 4. Estimated answer. 6 8 + 2 4 +_____ 9 2. Estimated answer. 6 8 7 0

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Estimating Sums

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Estimating Sums


5 7

+ 3 1


Actual answer

5 7 5 7

+ 3 1+ 3 1

8 8


Estimated answer

5 7 6 0

+ 3 1 +3 0

9 0


Your Turn! 


Actual answer

6 8

+ 2 4


Estimated answer

6 8

+ 2 4+_____

9 2


Estimated answer

6 8 7 0

+ 2 4+ 2 0_

9 2 9 0


Actual answer

367

+ 456


Estimated answer

367

+ 456+_____

823


Estimated answer

367 400

+ 456+_500

823900


Actual answer

897

+ 412


Estimated answer

897

+ 412+_____

1309


Estimated answer

897 900

+ 412+_ 400

1309 1300


Actual answer

635

+ 342


Estimated answer

635

+ 342+_____

977


Estimated answer

635 600

+ 342+_300

977900


Actual answer

3,269

+ 1,629


Estimated answer

3,269

+1,629 + _______

4,898


Estimated answer

3,269 3,000

+1,629+2,000

4,898 5,000


Actual answer

4,092

+ 2,808


Estimated answer

4,092

+2,808+_____

6,900


Estimated answer

4,092 4,000

+2,808+ 3,000

6,900 7,000


Actual Answers!


5 6+ 3 9


5 6+ 3 9 9 5


2 4 + 6 9


2 4 + 6 9 9 3


4 5 6+2 4 5


4 5 6+ 2 4 5 7 0 1


1 9 8 + 7 0 9


1 9 8 + 7 0 9 9 0 7


5, 2 9 0 + 3, 5 7 9


5, 2 9 0 + 3, 5 7 9 8, 8 6 9


3, 8 1 5 + 6, 2 9 9


3, 8 1 5 + 6, 2 9 9 1 0, 1 1 4


7, 4 3 8 + 4, 2 8 9


7, 4 3 8 + 4, 2 8 9 1 1, 7 2 7


Estimated Answers!


5 6+ 3 9


6 0+ 4 01 0 0


2 4 + 6 9


2 0 + 7 0 9 0


4 5 6+ 2 4 5


5 0 0+ 2 0 0 7 0 0


1 9 8 + 7 0 9


2 0 0 + 7 0 0 9 0 0


5, 2 9 0 + 3, 5 7 9


5, 0 0 0 + 4, 0 0 0 9, 0 0 0


3, 8 1 5 + 6, 2 9 9


4, 0 0 0+ 6, 0 0 0 1 0, 0 0 0


7, 6 3 8 + 4, 2 8 9


8, 0 0 0 + 4, 0 0 0 1 2, 0 0 0


Well, it’s about time you got the hang of it! Now, let’s make some A’s!!!


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