问题 解答题

下面各题怎样算简便就怎样算.

(1)1.32+0.25×1.8×4

(2)12.75÷[14.6-(1.3+8.2)]

(3)11×(8.4-5.8)-2.6

(4)7.2×0.9+0.01×7.2.

答案

(1)1.32+0.25×1.8×4,

=1.32+0.25×4×1.8,

=1.32+1.8,

=3.12,

(2)12.75÷[14.6-(1.3+8.2)],

=12.75÷[14.6-9.5],

=12.75÷5.1,

=2.5,

(3)11×(8.4-5.8)-2.6,

=11×2.6-2.6,

=(11-1)×2.6,

=26,

(4)7.2×0.9+0.01×7.2,

=7.2×(0.9+0.01),

=7.2×0.91,

=6.552.

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