①287×25×4 ②35×98 &n...
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解决时间 2021-02-05 18:48
- 提问者网友:轻浮
- 2021-02-05 08:46
①287×25×4 ②35×98 &n...
最佳答案
- 五星知识达人网友:玩世
- 2021-02-05 09:39
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.
=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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