2.25×7.2+2.8÷1/9簡便運算!
9.7÷1.25÷0.8簡便運算
9.7÷1.25÷0.8
=9.7÷(1.25×0.8)
=9.7÷1
=9.7
2.3*7.6+76*0.77怎樣簡便運算
2.3*7.6+76*0.77
=2.3*7.6+7.6*7.7
=(2.3+7.7)*7.6
=10*7.6
=76
9*77+11*37要怎麼簡便計算啊?
9×77+11×37
=9×7×11+11×37
=63×11+11×37
=(63+37)×11
=100×11
=1100