Question

12. Estimate the sum or difference as
indicated:
(i) 23,678 - 12,399
(rounding off to the nearest thousand)
(ii) 4,567 + 14,743
(rounding off to the nearest thousand)
(iii) 4,567 - 812
(rounding off to the nearest hundred)
(iv) 567 + 78
(rounding off to the nearest ten)​

Answer 1

1. 24,000-12,000=12,000
2. 5,000+15,000=20,000
3. 4,600-800=3,800
4. 570+80=650

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