问题
解答题
脱式计算(能简算就简算).
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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.