Question

estimate each of the following using general rule

(a) 730+998
(b) 796-314
(c) 12,904+2,888
(d) 28,292-21,492​

Answer 1

a) 1728

b) 482

c) 15792

d)6800

Answer 2

Step-by-step explanation:

• General rule here is estimating to nearest tens

(i) 730 estimating to tens is 730 ; 998 estimating to nearest tens is 1000

So 730+1000 = 1730

(ii) 796 estimating to tens is 800 ; 314 estimating to nearest tens is 310

So 800 - 310 = 490

(iii) 12904 estimating to tens is 12900 ; 2888 estimating to tens is 2890

So 12900 + 2890 = 15790

(iv) 28292 estimating to tens is 28290 ; 21492 estimating to tens is 21490

So 28290 + 21490 = 49780

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