二又5/6一(2/3+7/12) 15又1/4一五又1/2+七又5/6
二又5/6一(2/3+7/12) 15又1/4一五又1/2+七又5/6
2又5/6-(2/3+7/12)
=2又5/6-15/12
=2又10/12-15/12
=1又7/12,
15又1/4-5又1/2+7又5/6
=(15-5+7)+(1/4+5/6-1/2)
=17+7/12
=17又7/12
(一2/3)+|0一5 1/6|+|一4又5/6|+(一9又1/3)
带分数写的不方便,我直接化成假分数了
原式=-2/3+31/6+29/6-28/3
=-(2/3+28/3)+(31/6+29/6)
=-10+10
=0
-2/3+(0-5又1/2)-(-4又5/6)+(-1/3)
-2/3+(0-5又1/2)-(-4又5/6)+(-1/3)
=-2/3-1/3-5又1/2+4又5/6
=-1-5-1/2+4+5/6
=-2-1/2+5/6
=-2+1/3
=-5/3
1/6×(6.75÷5/12-2.4+4又1/4×2又2/5)-1又1/8-0.875
1/6×(6.75÷5/12-2.4+4又1/4×2又2/5)-1又1/8-0.875
=1/6×(27/4÷5/12-12/5+17/4×12/5)-9/8-7/8
=1/6×(27/4×12/5-12/5+17/4×12/5)-(9/8+7/8)
=1/6×12/5×(27/4-1+17/4)-2
=(1/6×12/5)×10-2
=4-2
=2
(5/12+1/15)*24*25 2001*七又5/8+1.375*2001+667除1/3 【2-(一又1/4*5/7+1.25*2/7)】/0.375
290 20010 2
(-3又5/7)+15.5+(-6又2/7)+(-5又1/2)=
(-3又5/7)+15.5+(-6又2/7)+(-5又1/2)
=-(3又5/7+6又2/7)+(15.5-5又1/2)
=-10+10
=0
1又1/4*5+[1/24+3/14*2+(1又7/12-0.625)]*0.7+1.875/7又1/2/[3又4/5/(3-2.4*14/15)]*2.5
1又1/4*5+[1/24+3/14*2+(1又7/12-0.625)]*0.7+1.875/7又1/2/[3又4/5/(3-2.4*14/15)]*2.5
=1又1/4*5+[1/24+3/14*2+23/24]*0.7+1.875/7又1/2/[3又4/5/(3-2.24)]*2.5
=1又1/4*5+[1+3/7]*0.7+1.875/7又1/2/[3又4/5/0.76]*2.5
=1又1/4*5+10/7*0.7+0.25/5**2.5
=6.25+1+0.125
=6.375
15又1/4-5又1/2+1又5/6
15又4分之1-5又2分之1+1又6分之5
=15+4分之1-(5+2分之1)+(1+6分之5)
=15+4分之1-5-2分之1+1+6分之5
=(15-5+1)+(4分之1-2分之1+6分之5)
=11+(12分之3-12分之6+12分之10)
=11+12分之7
=11又12分之7
(13又1/2-3又2/3*1+5又5/12除以2又1/6)*3/37=?
(13又1/2 - 3又2/3 * 1 + 5又5/12 ÷ 2又1/6)*3/37 这是题
=(13又1/2 - 3又2/3 + 65/12 ÷ 13/6)*3/37
=(13又1/2 - 3又2/3 + 2.5)*3/37
=(13.5 + 2.5 - 3又2/3)* 3/37
=(16 - 3又2/3)* 3/37
=12又1/3 * 3/37
=1
-1又5/6+(-5又2/3)+24又3/4+(-3又1/2)=?
13又3/4
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