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Question 1

Round off the numbers to the nearest whole number and estimate the answer for each addition:

a 21.95 + 56.24 is approximately equal to: check answer for question 1a.
b 27.31 + 70.82 is approximately equal to: check answer for question 1b.
c 127.4 + 359.8 is approximately equal to: check answer for question 1c.
d 342.96 + 199.8 is approximately equal to: check answer for question 1d.
e 700.02 + 120.1 is approximately equal to: check answer for question 1e.

Question 2

Now, without using a calculator, set out the following calculations to find the sum in each case:

a 21.95 + 56.24 = check answer for question 2a.
b 27.31 + 70.82 = check answer for question 2b.
c 127.4 + 359.8 = check answer for question 2c.
d 342.96 + 199.8 = check answer for question 2d.
e 700.02 + 120.1 = check answer for question 2e.