问题 解答题
脱式计算(能简便算的要简便算)
(1)89.3×43+38×89.3+893×1.9(2)10.01×101-10.01(3)4.75×17.5+2.5×4.75
(4)1.25×32×0.25(5)0.22×1.5+1.541÷2.3(6)(5.15-3.25)×0.4+0.36.
答案

(1)89.3×43+38×89.3+893×1.9,

=89.3×43+38×89.3+89.3×19,

=89.3×(43+38+19),

=89.3×100,

=8930;

(2)10.01×101-10.01,

=10.01×(101-1),

=10.01×100,

=1001;

(3)4.75×17.5+2.5×4.75,

=4.75×(17.5+2.5),

=4.75×20,

=95;

(4)1.25×32×0.25,

=1.25×8×4×0.25,

=(1.25×8)×(4×0.25),

=10×1,

=10;

(5)0.22×1.5+1.541÷2.3,

=0.33+0.67,

=1;

(6)(5.15-3.25)×0.4+0.36,

=1.9×0.4+0.36,

=0.76+0.36,

=1.12.

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