18.5-(5.6+4.8)⼀1.3怎么简便运算

2025-04-14 22:55:29
推荐回答(3个)
回答1:

18.5-(5.6+4.8)/1.3
=18.5-(5.6-0.4+0.4+4.8)/1.3
=18.5-(5.6-0.4)/1.3-(0.4+4.8)/1.3
=18.5-5.2/1.3-5.2/1.3
=18.5-4-4
=10.5

回答2:

18.5-(5.6+4.8)/1.3
=18.5-10.4/1.3
=18.5-8
=10.5

回答3:

要么(18.5×1.3-5.6-4.8)/1.3=13.65/1.3=10.5如何?