124*45+56*24-124利用簡便算灋計算,

124*45+56*24-124利用簡便算灋計算,


124*45+56*24-124
=124*45-124+56*24
=124*(45-1)+56*24
=124*44+56*24
=124*4*11+(40+16)(40-16)
=496*11+40^2-16^2
=5456+1600-256
=5200+1600
=6800



35035÷(35×91)怎麼簡便計算?還有18000÷75×24怎麼簡便計算?33066÷66怎麼簡便計算?


35035÷(35×91)
=35035÷35÷91
=1001÷91
=11
18000÷75×24
=18000x24/75
=18000x8/25
=180x8x(100/25)
=5760
33066÷66
=(330x100+66)÷66
=330÷66x100+66÷66
=500+1
=501