你好56-13+39等于多少?

2025-04-05 14:34:08
推荐回答(1个)
回答1:

解:56-13+39等于( 82 )
∵已知需求出56-13+39等于多少
∴56 - 13 + 39
= (60 - 4)- (10 + 3)+(40 - 1)
= 60 - 4 - 10 - 3 + 40 - 1
= (60 - 10 + 40)+(-4 - 3 - 1)
= (50 + 40)+(-7 - 1)
= 90 - 8
= 82
答:56-13+39等于82