1. Estimate each of the following using general rule: (a) 730 +998 (b) 796 - 314 (c) 12,904 +2,888 (c) 12,904 +2,888 (d) 28,292 - 21,496 Make ten more such examples of addition, subtraction and estimation of their outcome.
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(a)1728(b)472(c)35400(d)6791 examples:(a)92867-73925(b)3802+2658(c)34,349-32,485(d)49,561+92760
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