用递等式计算(能简算的要简算)21÷0.25÷0.413.75÷0.125-2.750.125×3
用递等式计算(能简算的要简算)21÷0.25÷0.413.75÷0.125-2.750.125×3.2×0.2593.7×0.32+93.7×0.6820.9+10.5÷...
用递等式计算(能简算的要简算)21÷0.25÷0.413.75÷0.125-2.750.125×3.2×0.2593.7×0.32+93.7×0.6820.9+10.5÷(5.2-3.5)
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(1)21÷0.25÷0.4
=21÷(0.25×0.4)
=21÷0.1
=210
(2)13.75÷0.125-2.75
=110-2.75
=107.25
(3)0.125×3.2×0.25
=(0.125×8)×(0.4×0.25)
=1×0.1
=0.1
(4)93.7×0.32+93.7×0.68
=93.7×(0.32+0.68)
=93.7×1
=93.7
(5)20.9+10.5÷(5.2-3.5)
=20.9+10.5÷1.7
=20.9+6
=27
=21÷(0.25×0.4)
=21÷0.1
=210
(2)13.75÷0.125-2.75
=110-2.75
=107.25
(3)0.125×3.2×0.25
=(0.125×8)×(0.4×0.25)
=1×0.1
=0.1
(4)93.7×0.32+93.7×0.68
=93.7×(0.32+0.68)
=93.7×1
=93.7
(5)20.9+10.5÷(5.2-3.5)
=20.9+10.5÷1.7
=20.9+6
3 |
17 |
=27
13 |
170 |
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