Page 36 - Whole Numbers (Addition and Subtraction)

To calculate 3 465 + 4 574 you can break both numbers down, work
with the parts of the same kind, and then build the answer up.

Break down: Writing the expanded
3 465 = 3 000 + 400 + 60 + 5 notations in separate
4 574 = 4 000 + 500 + 70 + 4 lines makes it easier to
see which parts belong
Work with the parts: together.

3 000 + 4 000 = 7 000
400 + 500 = 900
60 + 70 = 130
5 + 4 = 9

Build up the answer:

3 465 + 4 574
= 7 000 + 900 + 130 + 9
Transfer 100 from 130 to 900
= 7 000 + 1 000 + 30 + 9

Transfer 1 000 to 7 000
= 8 000 + 0 + 30 + 9
= 8 039

4. Break all numbers down to calculate the following:
(a) 4 478 + 3 827 (b) 6 289 + 1 877

(c) 866 + 967 + 678 (d) 1 287 + 991 + 658 + 786
5. Calculate.

(a) 387 + 387 + 387 + 387 + 387
(b) 387 + 387 + 387 + 387 + 387 + 387
(c) 387 + 387 + 387 + 387 + 387 + 387 + 387

6. Use your answers for question 5 to state how much each of the
following is.
(a) 387 × 5 (b) 387 × 7
(c) 1 935 ÷ 387 (d) 1 935 ÷ 5

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