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SUBTRACTION ESTIMATION
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Estimate the difference between 712-202
500
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Okay!
Estimate the difference between 542-357
200
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Okay!
Estimate the difference between 100-52
50
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Okay!
Estimate the difference between 674-356
300
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Okay!
Estimate the difference between 569-378
200
Oops!
Okay!
Estimate the difference between 600-421
179
Oops!
Okay!
Estimate the difference between 5784-4536
1200
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Okay!
Estimate the difference between 896-456
450
Oops!
Okay!
Estimate the difference between 400-164
200
Oops!
Okay!
Estimate the difference between 667-289
400
Oops!
Okay!
Estimate the difference between 784-223
550
Oops!
Okay!
Estimate the difference between 293-129
160
Oops!
Okay!
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