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Q: How can you Estimate the sum or difference using benchmarks?

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12,825

46.78-18.55 and estimate each sum or difference = 28.23

The sum is 2.05 and you don;t need to estimate such a simple sum!

2.0999999999999996

1423832

Sum is the result of an addition problem, while difference is the result of a subtraction problem. Addend Subtractend + Addend - Subtractor Sum Difference

54+86

The answer is -30.

3

7.000

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In arithmetic, estimate usually means rounding the numbers so they're easier to manipulate. Example: Estimate the sum of 432 and 267. You can round them to 430 and 270 and estimate the sum as 700. You could also round them to 400 and 300 and estimate the same total. To estimate a difference, just subtract them. 430 minus 270 is 160. The actual sum is 699 and the actual difference is 165, so your estimates came pretty close.

14

Because you will see that the sum or difference is close to your estimate. If it isn't that close, round the number you're estimating to the nearest compatible number and find the sum or difference Sum = Addition Difference = Subtraction Product = Multiplication Quotient = Division Does this answer help?

21964

sum is addition difference is subtraction

106 + 091 = 197 100 + 100 = 200 Answer: 3

8 + 11 = 19

the sum is 59.54 and the difference is 32.02.

A reasonable estimate of the sum of 78 and 119 is 197.

the opposite of a sum is the difference

No. The sum is the answer to an addition problem. The difference is the answer to a subtraction problem.

The sum is the answer for adding and the difference is the answer for subtracting...

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