#### Question 3

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

a | 67.8 – 21.9 is approximately equal to: | ||
---|---|---|---|

b | 56.28 – 32.89 is approximately equal to: | ||

c | 648.95 – 207.19 is approximately equal to: | ||

d | 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 | 67.8 – 21.9 = | ||
---|---|---|---|

b | 56.28 – 32.89 = | ||

c | 648.95 – 207.19 = | ||

d | 487.7 – 253.27 = |