脱式计算(能用简便计算的要用简便计算). 0.25×500×0.2 [16.7-(6.2+9.5)]×8.3 0.9+
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解决时间 2021-01-31 03:47
- 提问者网友:轻浮
- 2021-01-30 22:05
脱式计算(能用简便计算的要用简便计算). 0.25×500×0.2 [16.7-(6.2+9.5)]×8.3 0.9+
最佳答案
- 五星知识达人网友:归鹤鸣
- 2021-01-30 23:22
(1)0.25×500×0.2,
=0.25×(500×0.2),
=0.25×100,
=25;
(2)[16.7-(6.2+9.5)]×8.3,
=[16.7-15.7]×8.3,
=1×8.3,
=8.3;
(3)0.9+99×0.9,
=0.9×(99×1),
=0.9×100,
=90;
(4)10.1×87,
=(10+0.1)×87,
=87×10+0.1×87,
=870+8.7,
=878.7.
=0.25×(500×0.2),
=0.25×100,
=25;
(2)[16.7-(6.2+9.5)]×8.3,
=[16.7-15.7]×8.3,
=1×8.3,
=8.3;
(3)0.9+99×0.9,
=0.9×(99×1),
=0.9×100,
=90;
(4)10.1×87,
=(10+0.1)×87,
=87×10+0.1×87,
=870+8.7,
=878.7.
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