(+0.65)+(-1.9)+(-1.1)+(-3/20)+5又2/3+(-2又1/3)
2个回答
(+0.65)+(-1.9)+(-1.1)+(-3/20)+5又2/3+(-2又1/3)
=(0.65-0.15)-(1.9+1.1)+(5又2/3-2又1/3)
=1/2-3+3又1/3
=5/6
相关问题
(+0.65)+(-1.9)+(-1.1)+(-13/20)+(+5又2/3)+(-2又1/3)
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