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Question
Estimate the following numbers to nearest tens and then add or subtract.

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Solution

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Estimate each sum to the nearest thousand: (32836 + 16466)
Estimate each difference to the nearest hundred: (5612 − 3095)
Estimate the following using the general rules:
730 + 998
Give a rough estimate (by rounding off to nearest hundreds) and also a closer estimate (by rounding off to nearest tens):
439 + 334 + 4,317
Give a rough estimate (by rounding off to nearest hundreds) and also a closer estimate (by rounding off to nearest tens):
4853 + 662
Estimate the following using the general rules:
1110 - 1292
Estimate the following using the general rules:
980 – 688
