• # question_answer 17)                 Estimate each of the following using general rule. (a) 730 + 998                       (b) 796 ? 314                      (c) 12,904 + 2888               (d) 28,292 ? 21,496

(a) 730 + 998 $\because$ 730 $\to$ 700     [rounding off to nearest hundreds] 998 $\to$ 1000               [rounding off to nearest hundreds] $\therefore$ Estimated sum = 700 + 1000 = 1700 (b) 796 ? 314 $\because$ 796 $\to$ 800 [rounding off to nearest hundreds] 314$\to$300 (rounding off to nearest hundreds] $\therefore$Estimated difference = 800 ? 300 = 500 (c) 12,904 + 2888 $\because$ 12904 $\to$ 13000            [rounding off to nearest thousands] 2888 $\to$ 3000             [rounding off to nearest thousands] $\therefore$ Estimated sum = 13000 + 3000 =16000 (d) 28,292 ? 21,496 $\because$ 28,292 ? 28,000                     [rounding off to nearest thousands] 21,496 $\to$ 21,000     [rounding off to nearest thousands] $\therefore$ Estimated difference = 28000 ? 21000 = 7000
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