①287×25×4②35×98③168×327+168×673④125×64⑤125×15×4⑥(1500-250-25)×2.-数学

题目简介

①287×25×4②35×98③168×327+168×673④125×64⑤125×15×4⑥(1500-250-25)×2.-数学

题目详情

①287×25×4
②35×98
③168×327+168×673
④125×64
⑤125×15×4
⑥(1500-250-25)×2.
题型:解答题难度:中档来源:不详

答案

①287×25×4,
=287×(25×4),
=287×100,
=28700;

②35×98,
=35×(100-2),
=35×100-35×2,
=3500-70,
=3430;

③168×327+168×673,
=168×(327+673),
=168×1000,
=168000;

④125×64,
=125×(8×8),
=125×8×8,
=1000×8,
=8000;

⑤125×15×4,
=125×4×15,
=500×15,
=7500;

⑥(1500-250-25)×2,
=1500×2-250×2-25×2,
=3000-500-50,
=2500-50,
=2450.

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