Page 53 - Whole Numbers (Addition and Subtraction)

5. In each case, replace the given calculation with a different
easier calculation that will produce the same answer.
(a) 6 145 + 2 975 (b) 4 509 + 2 793

(c) 6 978 − 3 123 (d) 5 346 − 1 218
(e) 7 966 − 4 663 (f) 6 243 − 4 185
(g) 8 396 − 5 579 (h) 5 532 − 1 873
(i) 4 008 − 2 399 (j) 5 399 + 3 006

(k) 2 305 + 5 032 + 1 019 (l) 9 098 − 4 105 − 1 199

6. Calculate.
(a) 8 764 − (4 596 − 1 389)

(b) 8 764 − 4 596 + 1 389

(c) (8 764 − 4 596) − 1 389

(d) 8 764 − 4 596 − 1 389

7. What number is:
(a) 200 more than 2 945?

(b) 2 000 more than 2 945?

(c) 2 200 more than 2 945?

(d) 2 220 more than 2 945?
(e) 200 less than 2 945?

(f) 2 000 less than 2 945?

(g) 2 200 less than 2 945?

(h) 2 220 less than 2 945?

8. The sum of four numbers is 9 500.
Three of the numbers are 2 341, 578 and 4 690.
What is the fourth number?

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