计算下面各题.(能简算的要简算)(1)3.46+2.37+0.54+0.63 (2)50.8-(8.6+9.6×4)(3)25-4.2×1.4
答案:1 悬赏:70 手机版
解决时间 2021-01-21 18:37
- 提问者网友:做自己de王妃
- 2021-01-21 03:28
计算下面各题.(能简算的要简算)(1)3.46+2.37+0.54+0.63 (2)50.8-(8.6+9.6×4)(3)25-4.2×1.4
最佳答案
- 五星知识达人网友:底特律间谍
- 2021-01-21 03:54
(1)3.46+2.37+0.54+0.63
=(3.46+0.54)+(2.37+0.63)
=4+3
=7;
(2)50.8-(8.6+9.6×4)
=50.8-(8.6+38.4)
=50.8-47
=3.8;
(3)25-4.2×1.4+1.08
=25-5.88+1.08
=25-(5.88-1.08)
=25-4.8
=20.2;
(4)8-1.26×1.5+93.89
=8-1.89+93.89
=8+(93.89-1.89)
=8+92
=100.
=(3.46+0.54)+(2.37+0.63)
=4+3
=7;
(2)50.8-(8.6+9.6×4)
=50.8-(8.6+38.4)
=50.8-47
=3.8;
(3)25-4.2×1.4+1.08
=25-5.88+1.08
=25-(5.88-1.08)
=25-4.8
=20.2;
(4)8-1.26×1.5+93.89
=8-1.89+93.89
=8+(93.89-1.89)
=8+92
=100.
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