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OpenStudy (anonymous):
Use front end estimation to estimate the difference of 2469 – 318.
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OpenStudy (anonymous):
With front end estimation, we only round and add the numbers in the leftmost place or the very last number on the left.
OpenStudy (anonymous):
Example: 21 + 58 can be approximated by 20 + 60 = 80 ***Hope this helps. :)
OpenStudy (cwrw238):
2000 - 300
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