问题 解答题
脱式计算,能简算的要简算.
1.25×4.6×84.58×0.32-0.94(0.8+8)×0.1250.65×2019.7×5.6+9.7×4.4.
答案

(1)1.25×4.6×8,

=1.25×8×4.6,

=10×4.6,

=46;

(2)4.58×0.32-0.94,

=1.4656-0.94,

=0.5256;

(3)(0.8+8)×0.125,

=0.8×0.125+8×0.125,

=0.1+1,

=1.1;

(4)0.65×201,

=0.65×(200+1),

=0.65×200+0.65×1,

=130+0.65,

=130.65;

(5)9.7×5.6+9.7×4.4,

=9.7×(5.6+4.4),

=9.7×10,

=97.

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