问题 解答题
脱式计算(能简算就简算).
10-5×1.6598.4-98.4×0.93.2×1.25×0.25
7.75×0.4-0.432÷0.4810.1×8.64.35-(2.35-1.7)
答案

(1)10-5×1.65,

=10-8.25,

=1.75;

(2)98.4-98.4×0.9,

=98.4×(1-0.9),

=98.4×0.1,

=9.84;

(3)3.2×1.25×0.25,

=(4×0.8)×1.25×0.25,

=(4×0.25)×(0.8×1.25),

=1×1,

=1;

(4)7.75×0.4-0.432÷0.48,

=3.1-0.9,

=2.2;

(5)10.1×8.6,

=(10+0.1)×8.6,

=10×8.6+0.1×8.6,

=86+0.86,

=86.86;

(6)4.35-(2.35-1.7),

=4.35-2.35+1.7,

=2+1.7,

=3.7.

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