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计算下面各题 能简便的要写出简算过程.①613÷926×23②57×23+27÷32③(11
问题详情
计算下面各题,能简便的要写出简算过程.
①
②
③(
④[1-(
⑤(
⑥
参考答案
①613÷926×23,
=43×23,
=89;
②57×23+27÷32,
=57×23+27×23,
=(57+27)×23,
=1×23,
=23;
③(115+349)×15-4549,
=115×15+349×15-4549,
=1+4549-4549,
=1-(4549-4549),
=1-0,
=1;
④[1-(38+14)]÷14,
=[1-58]÷14,
=38÷14,
=32;
⑤(511+917)×11×17,
=(511+917)×(11×17),
=511×(11×17)+917×(11×17),
=5×17+9×11,
=85+99,
=184;
⑥78÷4-0.25×58,
=78×14-14×58,
=14×(78-58),
=14×14,
=116.
考点:过程