问题 解答题

用你喜欢的方法计算下列各题.

(1)3.6+(7.43-3.83)×2.5 (2)100×9.5×0.98+9.5×2

(3)54.3×1.8+54.3×0.3-54.3×0.1(4)〔(2+2.8)÷0.6-1.5〕×0.04.

答案

(1)3.6+(7.43-3.83)×2.5

=3.6+3.6×2.5,

=3.6+9,

=12.6;

(2)100×9.5×0.98+9.5×2

=9.5×98+9.5×2,

=9.5×(98+2),

=9.5×100,

=950;

(3)54.3×1.8+54.3×0.3-54.3×0.1

=54.3×(1.8+0.3-0.1),

=54.3×2,

=108.6;

(4)〔(2+2.8)÷0.6-1.5〕×0.04

=(4.8÷0.6-1.5)×0.04,

=(8-1.5)×0.04,

=6.5×0.04,

=0.26.

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