When estimating the sum of 48765 and 9221, you can round each number to the nearest thousand. 48765 rounds to 49000, and 9221 rounds to 9000. Adding these rounded numbers gives you an estimated sum of 58000. To estimate the difference, you can round 48765 to 49000 and 9221 to 9000. Subtracting these rounded numbers gives you an estimated difference of 4000.
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68 - 56 is 12 plus 54 is 66 plus 66 is 132.
-4
Plus 20 is hotter.
3.75 is the answer.