Page 43 - Whole Numbers (Addition and Subtraction)

4. Write number sentences to describe five different ways in
which each of the following can be formed by adding three
different multiples of 100.
(a) 2 300 (b) 3 500

(c) 5 000 (d) 4 200

5. Copy and complete the following.
(a) 870 + . . . → 1 000 + . . . → 3 600 + . . . → 4 000 + . . . = 7 234

(b) . . . + 300 → 2 000 + 4 000 → . . . + . . . → 7 450 + . . . = 8 000

(c) 920 + . . . → 1 200 + . . . → 3 000 + . . . → 4 700 + . . . = 4 900

(d) 900 + 800 → . . . + 70 → . . . + 60 → . . . + 8 → . . . + 5 = . . . .
(e) 900 + 70 → . . . + 8 → . . . + 800 → . . . + 60 → . . . + 5 = . . . .

6. Calculate 230 + 420 + 80 + 130 + 60.

To calculate 340 + 280 we can shift 200 from the 280 to the 340:
200

340 + 280 = 540 + 80
The 80 can now be added in steps, by filling up to 600 first:
540 + 60 → 600 + 20 = 620

So 340 + 280 = 620.

7. Transfer the hundreds part of the Transfer is another
second number to the first number in word for shift.
each case, and then add on to find
the answer.
(a) 670 + 280 (b) 870 + 460
(c) 740 + 690 (d) 1 240 + 690
(e) 8 460 + 330 (f) 5 940 + 590

(g) 6 660 + 840 (h) 3 780 + 770

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