數學 急~~~~~~~~~~~

我在題目中加上了括號令題目更易看清，希望我的理解沒錯。

Estimate 437.58/[3.44+(1.603)2] Give the answer in whole number.
A.68
B.73
C.78
D.83

437.58/[3.44 + (1.603)2]

≈ 438/[3.44 + 1.62]

= 438/[3.44 + 2.56]

= 438/6

= 73

所以答案是 B.73

step very clear!!

use you cauculator (casio fx 50f)

1.603.2shift x 2 ans=2.569609 save m+
3.44+ (save m+)= 6.009609 save kout 1
437.58/6.009609= B.73