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能简算的要简算10÷1.25÷810.1×5632×0.257.8×9+7.80.054÷〔(2.1-2.09)×0.1〕
题目详情
能简算的要简算
10÷1.25÷8
10.1×56
32×0.25
7.8×9+7.8
0.054÷〔(2.1-2.09)×0.1〕
10÷1.25÷8
10.1×56
32×0.25
7.8×9+7.8
0.054÷〔(2.1-2.09)×0.1〕
▼优质解答
答案和解析
(1)10÷1.25÷8
=10÷(1.25×8)
=10÷10
=1
(2)10.1×56
=(10+0.1)×56
=10×56+0.1×56
=560+5.6
=565.6
(3)32×0.25
=8×4×0.25
=8×(4×0.25)
=8×1
=8
(4)7.8×9+7.8
=7.8×(9+1)
=7.8×10
=78
(5)0.054÷[(2.1-2.09)×0.1]
=0.054÷[0.01×0.1]
=0.054÷0.001
=54
=10÷(1.25×8)
=10÷10
=1
(2)10.1×56
=(10+0.1)×56
=10×56+0.1×56
=560+5.6
=565.6
(3)32×0.25
=8×4×0.25
=8×(4×0.25)
=8×1
=8
(4)7.8×9+7.8
=7.8×(9+1)
=7.8×10
=78
(5)0.054÷[(2.1-2.09)×0.1]
=0.054÷[0.01×0.1]
=0.054÷0.001
=54
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