#### Question 3

Round each number to the nearest whole number and then estimate the answer for these subtractions:

a question 3a 67.8 – 21.9 is approximately equal to: question 3b56.28 – 32.89 is approximately equal to: question 3c 648.95 – 207.19 is approximately equal to: question 3c 487.7 – 253.27 is approximately equal to:

#### Question 4

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

a question 4a67.8 – 21.9 = question 4b56.28 – 32.89 = question 4c648.95 – 207.19 = question 4c487.7 – 253.27 =