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用简便方法计算下面各题.13.83-(9.56-6.17)-3.442.67×72+2.67×29-2.6716.05-(6.05-0.56)51.27-8.66-1.34386÷125÷8+9.998347×9.8+347×5.3-347×5.1.
题目详情
用简便方法计算下面各题.
13.83-(9.56-6.17)-3.44 | 2.67×72+2.67×29-2.67 |
16.05-(6.05-0.56) | 51.27-8.66-1.34 |
386÷125÷8+9.998 | 347×9.8+347×5.3-347×5.1. |
▼优质解答
答案和解析
(1)13.83-(9.56-6.17)-3.44
=13.83-3.39-3.44
=13.83-(3.39+3.44)
=13.83-6.83
=7
(2)2.67×72+2.67×29-2.67
=2.67×(72+29-1)
=2.67×100
=267
(3)16.05-(6.05-0.56)
=16.05-6.05+0.56
=10+0.56
=10.56
(4)51.27-8.66-1.34
=51.27-(8.66+1.34)
=51.27-10
=41.27
(5)386÷125÷8+9.998
=386÷(125×8)+9.998
=0.386+9.998
=10.384
(6)347×9.8+347×5.3-347×5.1
=347×(9.8+5.3-5.1)
=347×10
=3470
=13.83-3.39-3.44
=13.83-(3.39+3.44)
=13.83-6.83
=7
(2)2.67×72+2.67×29-2.67
=2.67×(72+29-1)
=2.67×100
=267
(3)16.05-(6.05-0.56)
=16.05-6.05+0.56
=10+0.56
=10.56
(4)51.27-8.66-1.34
=51.27-(8.66+1.34)
=51.27-10
=41.27
(5)386÷125÷8+9.998
=386÷(125×8)+9.998
=0.386+9.998
=10.384
(6)347×9.8+347×5.3-347×5.1
=347×(9.8+5.3-5.1)
=347×10
=3470
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