有理数的加减法
(+1又5分之4)-(+3分之2)-(-5分之1)-(+1又三分之一)-8-(-12)+7+(-4)-(-3分之1)+(-4分之3)-(-2分之1)-12分之5...
(+1又5分之4)-(+3分之2)-(-5分之1)-(+1又三分之一)
-8-(-12)+7+(-4)
-(-3分之1)+(-4分之3)-(-2分之1)-12分之5 展开
-8-(-12)+7+(-4)
-(-3分之1)+(-4分之3)-(-2分之1)-12分之5 展开
展开全部
(+1又5分之4)-(+3分之2)-(-5分之1)-(+1又三分之一)
=1+4/5-2/3+1/5-(1+1/3)
=1+4/5-2/3+1/5-1-1/3
=(1-1)+(4/5+1/5)-(2/3+1/3)
=0+1-1
=0
-8-(-12)+7+(-4)
=-8+12+7-4
=-4+7-4
=3-4
=-1
-(-3分之1)+(-4分之3)-(-2分之1)-12分之5
=1/3-3/4+1/2-5/12
=(4-9+6-5)/12
=-4/12
=-1/3
=1+4/5-2/3+1/5-(1+1/3)
=1+4/5-2/3+1/5-1-1/3
=(1-1)+(4/5+1/5)-(2/3+1/3)
=0+1-1
=0
-8-(-12)+7+(-4)
=-8+12+7-4
=-4+7-4
=3-4
=-1
-(-3分之1)+(-4分之3)-(-2分之1)-12分之5
=1/3-3/4+1/2-5/12
=(4-9+6-5)/12
=-4/12
=-1/3
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