5 x 12 - 20 = 60 -20 =40
请你采纳, 谢谢!!!
12X5-20
= 60-20
= 40
还剩40只
5 x 12 - 20 = 60 -20 =40(只)
5*12-20=40(只)
5×12=60
60-20=40
40只。12*5=60.。60-20=40
5*12=60(只)
60-20=40(只)
12*5-20=40只
还剩下40只