-1.4-2又2⼀3-(-1又2⼀5)+(-3.2)求 简便计算

2024-12-20 15:59:00
推荐回答(3个)
回答1:

您好:

-1.4-2又2/3-(-1又2/5)+(-3.2)
=-1.4-8/3-1.4-3.2
=(-1.4-1.4-3.2)-8/3
=-6-8/3
=-8又2/3

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回答2:

-1.4 - (2+ 2/3) - [ -(1+ 2/5)] + (-3.2)
= -1.4 - 2 - 2/3 + (1+0.4) - (3+ 1/5)
= -1.4 + 1.4 - 2 - 2/3 - 3 - 1/5
= -2 - 3 - 10/15 - 3/15
= -5 - 13/15
= -(5+ 13/15)

回答3:

解:
-1.4-2又2/3-(-1又2/5)+(-3.2)
=-1又2/5-2又2/3+1又2/5-3.2
=-1又2/5+1又2/5-2又2/3-3又1/5
=-2又2/3-3又1/5
=-5-(2/3+1/5)
=-5又13/15