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计算下面各题.(能简便计算的要简便计算)4.2×(6.18-3.03)+6.315.02-6.8-(1.02+1.2)0.6×[(5-0.68

答案:1  悬赏:20  手机版
解决时间 2021-02-11 02:30
  • 提问者网友:精神病院里
  • 2021-02-10 21:49
计算下面各题.(能简便计算的要简便计算)4.2×(6.18-3.03)+6.315.02-6.8-(1.02+1.2)0.6×[(5-0.68
最佳答案
  • 五星知识达人网友:長槍戰八方
  • 2021-02-10 22:27
(1)4.2×(6.18-3.03)+6.3,
=4.2×3.15+6.3,
=13.23+6.3,
=19.53;

(2)15.02-6.8-(1.02+1.2),
=15.02-6.8-1.02-1.2,
=(15.02-1.02)-(6.8+1.2),
=14-8,
=6;

(3)0.6×[(5-0.68)÷1.2],
=0.6×[4.32÷1.2],
=0.6×3.6,
=2.16;

(4)2.7÷4+6.3×0.25,
=2.7×0.25+6.3×0.25,
=(2.7+6.3)×0.25,
=9×0.25,
=2.25;

(5)(6.02+2.8)÷0.4-2.05,
=8.82÷0.4-2.05,
=22.05-2.05,
=20;

(6)3.08×3.5+6.2×3.08+3.08×0.3,
=(3.5+6.2+0.3)×3.08,
=10×3.08,
=30.8.

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