8.45+(-9)+(-2 1/3)-8+(-5 1/4)-(-3 1/3)
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8.45+(-9)+(-2 1/3)-8+(-5 1/4)-(-3 1/3)
咱旳家庭作业,
不会写这题..
8点45加负9,加负2又3分之1,减8,加负5又4分之1,减负3又3分之1
记得把解题过程写下来...
咱旳家庭作业,
不会写这题..
8点45加负9,加负2又3分之1,减8,加负5又4分之1,减负3又3分之1
记得把解题过程写下来...
=8.45-9-(2 1/3)-8-(5 1/4)+(3 1/3)
=8.45-9-7/3-8-21/4+10/3
=0.45-9-7/3+10/3-21/4
=45/100-9+10/3-7/3-21/4
=9/20-9+1-21/4
=9/20-8-(21*5)/(4*5)(通分)
=9/20-8-105/20
=-8-96/20
=-8-24/5
=-40/5-24/5
=-(40/5+24/5)
=-64/5
=-12 4/5 (负十二又五分之四)
=8.45-9-7/3-8-21/4+10/3
=0.45-9-7/3+10/3-21/4
=45/100-9+10/3-7/3-21/4
=9/20-9+1-21/4
=9/20-8-(21*5)/(4*5)(通分)
=9/20-8-105/20
=-8-96/20
=-8-24/5
=-40/5-24/5
=-(40/5+24/5)
=-64/5
=-12 4/5 (负十二又五分之四)
8.45+(-9)+(-2 1/3)-8+(-5 1/4)-(-3 1/3)
1/1*2*3+1/2*3*4+1/3*4*5+.+1/8*9*10
- - - - - - - - - 》《- - 7 1- -2 8 -》《8 9- -5 3 - - 1》《- -4 -
5+1+2+1+3+9+8+4+5
1:8 2:9 1:9 3:4 1:3 ...
1+1+2+2+3+3+4+4+5+5+6+67+78+8+9+9
1/9+1/5+3/5+4/9+2/3+7/8+1/6+5/7+3/7+5/8+3/5+1/8+2/9=?
化简:1/1*2+1/2*3+1/3*4+1/4*5+1/5*6+1/6*7+1/7*8+1/8*9+1/9*10
1+2+3+4+5+6+7+8+9+8+7+4+56+1+2+3
(-1/8)*1/9/(1/12-2/3+3/4-5/8)怎么简算?
1/2*3*4+1/3*4*5+.+1/8*9*10
7/9*5/6/14/27 1/2*2/5+9/10/9/20 5/8*1/4/5/8*1/4 (1/2+2/3+3/4