Page 9 - Whole Numbers (Addition and Subtraction)

11. What must you add to 8 to get 13?

12. What is the difference between 15 m and 9 m?

13. (a) Copy and complete these calculations:

14 + 6 → . . . + 10 → . . . + 2 = . . .

(b) How much did you add on to 14 in total?

(c) How much is 14 + 18? subtraction is the
inverse of addition.
(d) How much is 32 − 18? Addition is the inverse

(e) How much is 32 − 14? of subtraction.

14. Copy the number sentences for which you cannot find the
answers quickly.

(a) 10 − 5 = . . . (b) 15 − 8 = . . . (c) 15 − 7 = . . .
(d) 15 − 9 = . . . (e) 15 − 5 = . . . (f) 15 − 6 = . . .
(g) 15 − 10 = . . . (h) 15 − 4 = . . . (i) 5 − 3 = . . .
(j) 10 − 7 = . . . (k) 17 − 8 = . . . (l) 17 − 9 = . . .
(m) 9 − 7 = . . . (n) 17 − 7 = . . . (o) 17 − 6 = . . .
(p) 17 − 10 = . . . (q) 7 − 4 = . . . (r) 7 − 3 = . . .
(s) 10 − 4 = . . . (t) 14 − 8 = . . . (u) 14 − 7 = . . .

(v) 14 − 9 = . . . (w) 14 − 4 = . . . (x) 14 − 6 = . . .

15. Copy the number sentences for which you cannot find the
answers quickly.

(a) 14 − 10 = . . . (b) 14 − 5 = . . . (c) 14 − 3 = . . .
(d) 10 − 9 = . . . (e) 19 − 8 = . . . (f) 19 − 7 = . . .
(g) 19 − 9 = . . . (h) 19 − 2 = . . . (i) 19 − 6 = . . .
(j) 19 − 10 = . . . (k) 19 − 4 = . . . (l) 19 − 3 = . . .
(m) 10 − 6 = . . . (n) 16 − 8 = . . . (o) 16 − 7 = . . .
(p) 16 – 9 = . . . (q) 16 − 6 = . . . (r) 16 − 5 = . . .

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