怎么用简便计算,计算(1300-520)⼀13下一个是235x99

2025-03-23 20:33:48
推荐回答(2个)
回答1:

(1300-520)/13
=1300/13-520/13
=100-40
=60

235*99
=235*(100-1)
=235*100-235
=23265

回答2:

(1300_520)=(1300_500_20)=1250_20=1230
235x99=235x(100_1)=23500_235=23265