计算: (1)-4.2+5.7-8.4+10 = (2)-1/4+5/6+2 30
计算:(1)-4.2+5.7-8.4+10=(2)-1/4+5/6+2/3-1/2=(3)3又1/4+(-2又3/5)-(-5又1/4)+(-8又2/5)=(4)(-4又...
计算:
(1)-4.2+5.7-8.4+10
=
(2)-1/4+5/6+2/3-1/2
=
(3)3又1/4+(-2又3/5)-(-5又1/4)+(-8又2/5)
=
(4)(-4又7/9)-(-3又1/6)
-(+2又2/9)+(-6又1/6)
=
(斜线是分数线) 展开
(1)-4.2+5.7-8.4+10
=
(2)-1/4+5/6+2/3-1/2
=
(3)3又1/4+(-2又3/5)-(-5又1/4)+(-8又2/5)
=
(4)(-4又7/9)-(-3又1/6)
-(+2又2/9)+(-6又1/6)
=
(斜线是分数线) 展开
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