12/13×12/13等于多少?
12/13×12/13等于多少?
日期:2021-10-27 04:46:13 人气:1
(1)(+16)+(-12)+24+(-18) =16-12+24-18 =40-30 =10;(2)(-3)÷(-5 7 )×(-1 3 )×4 7 =-3×(-7 5 )×(-1 3 )×4 7 =1×(-4 5 ) =-4 5 ;(3)-7×(-22 7 )+19×(-22 7 )-5×(-22 7 ) =(-7+19-5)×(-22 7 ) =7×(-22 7 ) =-22.