Estimate each of the following using general rule: (a) 730 + 998 (b) 796 – 314 (c) 12,904 + 2,888 (d) 28,292 – 21,496
Estimate each of the following using general rule:
(a) 730 + 998
(b) 796 – 314
(c) 12,904 + 2,888
(d) 28,292 – 21,496
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1 Answers
(a) 730 round off to 700
998 round off to 1000
Estimated sum = 700+1000 = 1700
(b) 796 round off to 800
314 round off to 300
Estimated difference = 800-300 = 500
(c) 12904 round off to 13000
2888 round off to 3000
Estimated sum = 13000+3000 = 16000
(d) 28292 round off to 28000
21496 round off to 21000
Estimated difference= 28000-21000 = 7000
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