问题
解答题
脱式计算,能简便的要简便.
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答案
(1)17×(100-88),
=17×12,
=204;
(2)282+142+158,
=282+(142+158),
=282+300,
=582;
(3)577+204,
=577+200+4,
=777+4,
=781;
(4)125×25×32,
=125×25×4×8,
=(125×8)×(25×4),
=1000×100,
=100000;
(5)35×14,
=35×2×7,
=70×7,
=490;
(6)800-35×8,
=800-280,
=520.