Page 39 - Whole Numbers (Addition and Subtraction)

8. Calculate each of the following by breaking both numbers
down into place value parts, working with the parts and
building the answers up.
(a) 7 698 − 2 354 (b) 6 567 − 4 143

(c) 6 559 − 3 325 (d) 6 552 − 3 325
9. Describe the work that you did in question 8(a) by using
brackets, as demonstrated at the bottom of the previous page.

10. Ben has R4 325 and he has to pay R2 768 rent for his house.
How much money will he have left?

11. Calculate 6 254 − 2 876.

In a case like 6 254 − 2 876, some place value parts of the bigger
number are smaller than the parts you have to subtract.
In a case like this, you can make transfers (shifts) between the
place value parts of the bigger number to make it easier to do the
subtractions with the place value parts:
6 254 = 6 000 + 200 + 50 + 4

1 000 100 10
= 5 000 + 1 100 + 140 + 14
2 876 = 2 000 + 800 + 70 + 6

5 000 − 2 000 = 3 000
1 100 − 800 = 300
140 − 70 = 70
14 − 6 = 8

6 254 − 2 876 = 3 000 + 300 + 70 + 8
= 3 378

12. Calculate by breaking both numbers down into place value
parts. Check each answer by doing addition.
(a) 5 346 − 3 128 (b) 5 346 − 2 274

(c) 5 346 − 1 825 (d) 5 346 − 3 177
(e) 5 346 − 2 559 (f) 7 132 − 3 654

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