1/3+(-1/5)-1+3/2 0.5+(-1/4)-(-2.75)+1/2 (2/3)+(-1/6) -(1/4)-
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1/3+(-1/5)-1+3/2 0.5+(-1/4)-(-2.75)+1/2 (2/3)+(-1/6) -(1/4)-1/2
麻烦快点我要交给老师的
麻烦快点我要交给老师的
1/3+(-1/5)-1+3/2
=1/3-1/5-1+3/2
=(1/3+3/2)-(1/5+1)
=11/6-6/5
=55/30-36/30
=19/30
0.5+(-1/4)-(-2.75)+1/2
=0.5-1/4+2.75+1/2
=0.5-0.25+2.75+0.5
=3.5
(2/3)+(-1/6)-(1/4)-1/2
=2/3-1/6-1/4-1/2
=(2/3-1/6-1/2)-1/4
=0-1/4
=-1/4
=1/3-1/5-1+3/2
=(1/3+3/2)-(1/5+1)
=11/6-6/5
=55/30-36/30
=19/30
0.5+(-1/4)-(-2.75)+1/2
=0.5-1/4+2.75+1/2
=0.5-0.25+2.75+0.5
=3.5
(2/3)+(-1/6)-(1/4)-1/2
=2/3-1/6-1/4-1/2
=(2/3-1/6-1/2)-1/4
=0-1/4
=-1/4
1).3/1+(—6/5) 2).27-18+(-7)-32 3).0.5+(-4/1)-(-2.75)+2/1 4).
(-0.5)+(3又1/4)+2.75+(-5又1/2) =
(-5 右2分之1)-(-2.75)+3 右4分之1+(-0.5)=?
(-0.5)+3又4分之1+2.75+(5又2分之1)怎么做
27-18+(-7)-32 3分之1+(-5分之1)+1+3分之2 0.5+(-4分之1)-(-2.75)+2分之1
(-0.5)-(-3又4分之1)+2.75-(+7又2分之1)
27-18+(-7)-32 3分之1+(-5分之1)-1+3分之1 0.5+(-4分之1)-(2.75)+2分之1
1.(-0.5)-(-3又1/4)+2.75-(+7又1/2)
﹣0.5-3又4分之1+(﹣2.75)+7又2分之1
1.-0.5-(-3又1/4)+2.75-(+7又1/2)
第一题:0.5+(-1/4)-(-2.75)+1/2
.(-0.5)+3又4分之1+2.75+(-5又2分之1)要用简便计算