来自潘伟华的问题
脱式计算,怎样简便就怎样算4×0.8×2.5×1.257.7×7+7.7×2+7.71000÷32÷0.25÷1.25.
脱式计算,怎样简便就怎样算
4×0.8×2.5×1.25
7.7×7+7.7×2+7.7
1000÷32÷0.25÷1.25.
1回答
2020-05-07 00:53
脱式计算,怎样简便就怎样算4×0.8×2.5×1.257.7×7+7.7×2+7.71000÷32÷0.25÷1.25.
脱式计算,怎样简便就怎样算
4×0.8×2.5×1.25
7.7×7+7.7×2+7.7
1000÷32÷0.25÷1.25.
(1)4×0.8×2.5×1.25
=(4×2.5)×(0.8×1.25)
=10×1
=10
(2)7.7×7+7.7×2+7.7
=7.7×(7+2+1)
=7.7×10
=77
(3)1000÷32÷0.25÷1.25
=1000÷32÷14