Q: Why Estimate the sum of 12.3 and 9.75?

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The sum of 123 is 123.

120+80

9*(1865 + 975) = 25560 thank you

7272 * * * * * WRONG! Sum from 23 to 123 = (sum from 1 to 123) minus (sum from 1 to 22) = 123*124/2 - 22*23/2 = 7626 - 253 = 7373. NOT 7272!

113+7+3 = 123

Related questions

The sum of 123 is 123.

120+80

9*(1865 + 975) = 25560 thank you

975

7272 * * * * * WRONG! Sum from 23 to 123 = (sum from 1 to 123) minus (sum from 1 to 22) = 123*124/2 - 22*23/2 = 7626 - 253 = 7373. NOT 7272!

The sum of 123 and 2,223,223 is 2,223,346

113+7+3 = 123

The sum of 123 and 654 is 777.

150

123

It is in the middle: (123+309)/2 = 216

They are: -39 -41 -43 = -123