231+229+233簡便計算
230+1+230-1+230+3
233乘33加33簡便計算
233X33+33=(233+1)X33=234X33=7722
求48÷12×(492-218)的簡便計算如果計算,
48÷12×(492-218)=4×(492+8-210)
=4×(500-200+10)
=4×310
=4×(300+10)
=1200+40
=1240
365×99怎樣簡便運算?
365×99
=365×(100-1)
=365×100-365
=36500-365
=36135