初一有理数的加减运算-9+4/5+12-5-4/5 2.5-4+(-1/2) -40-28-(-19)+(-24) 2/3-1/8-(-1/3)加3/8 5/6-1/7-1/6+(-6/7) 9.25-(+1/4)+2又1/8-(-4又3/8) -1.5+2.25-3又1/2-5又1/4 -1/8-(+1又1/3)+(3又3/4)-(-5/8)-
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![初一有理数的加减运算-9+4/5+12-5-4/5 2.5-4+(-1/2) -40-28-(-19)+(-24) 2/3-1/8-(-1/3)加3/8 5/6-1/7-1/6+(-6/7) 9.25-(+1/4)+2又1/8-(-4又3/8) -1.5+2.25-3又1/2-5又1/4 -1/8-(+1又1/3)+(3又3/4)-(-5/8)-](/uploads/image/z/769144-40-4.jpg?t=%E5%88%9D%E4%B8%80%E6%9C%89%E7%90%86%E6%95%B0%E7%9A%84%E5%8A%A0%E5%87%8F%E8%BF%90%E7%AE%97-9%2B4%2F5%2B12-5-4%2F5+2.5-4%2B%EF%BC%88-1%2F2%EF%BC%89+-40-28-%EF%BC%88-19%EF%BC%89%2B%EF%BC%88-24%EF%BC%89+2%2F3-1%2F8-%EF%BC%88-1%2F3%EF%BC%89%E5%8A%A03%2F8+5%2F6-1%2F7-1%2F6%2B%EF%BC%88-6%2F7%EF%BC%89+9.25-%EF%BC%88%2B1%2F4%EF%BC%89%2B2%E5%8F%881%2F8-%EF%BC%88-4%E5%8F%883%2F8%EF%BC%89+-1.5%2B2.25-3%E5%8F%881%2F2-5%E5%8F%881%2F4+-1%2F8-%EF%BC%88%2B1%E5%8F%881%2F3%EF%BC%89%2B%EF%BC%883%E5%8F%883%2F4%EF%BC%89-%EF%BC%88-5%2F8%EF%BC%89-)
初一有理数的加减运算-9+4/5+12-5-4/5 2.5-4+(-1/2) -40-28-(-19)+(-24) 2/3-1/8-(-1/3)加3/8 5/6-1/7-1/6+(-6/7) 9.25-(+1/4)+2又1/8-(-4又3/8) -1.5+2.25-3又1/2-5又1/4 -1/8-(+1又1/3)+(3又3/4)-(-5/8)-
初一有理数的加减运算
-9+4/5+12-5-4/5 2.5-4+(-1/2) -40-28-(-19)+(-24) 2/3-1/8-(-1/3)加3/8 5/6-1/7-1/6+(-6/7) 9.25-(+1/4)+2又1/8-(-4又3/8) -1.5+2.25-3又1/2-5又1/4 -1/8-(+1又1/3)+(3又3/4)-(-5/8)-(+4又2/3) (4/5+1/3)+(1-1/5+2/3)
初一有理数的加减运算-9+4/5+12-5-4/5 2.5-4+(-1/2) -40-28-(-19)+(-24) 2/3-1/8-(-1/3)加3/8 5/6-1/7-1/6+(-6/7) 9.25-(+1/4)+2又1/8-(-4又3/8) -1.5+2.25-3又1/2-5又1/4 -1/8-(+1又1/3)+(3又3/4)-(-5/8)-
-9+4/5+12-5-4/5
=-9+12-5-4/5+4/5
=-2+0
=-2
2.5-4+(-1/2)
=2.5-4-0.5
=2.5-0.5-4
=2-4
=-2
-40-28-(-19)+(-24)
=-40-28+19-24
=-73
2/3-1/8-(-1/3)+3/8
=2/3-1/8+1/3+3/8
=2/3+1/3+3/8-1/8
=1+1/4
=5/4
5/6-1/7-1/6+(-6/7)
=5/6-1/7-1/6-6/7
=5/6-1/6-6/7-1/7
=2/3-1
=-1/3
9.25-(+1/4)+2又1/8-(-4又3/8)
=9+1/4-1/4+2+1/8+4+3/8
=9+2+4+3/8+1/8
=15+1/2
=15+0.5
=15.5
-1.5+2.25-3又1/2-5又1/4
=-1-1/2+2+1/4-3-1/2-5-1/4
=-1+2-3-5-1/2-1/2+1/4-1/4
=-7-1
=-8
-1/8-(+1又1/3)+(3又3/4)-(-5/8)-(+4又2/3)
=-1/8-1-1/3+3+3/4+5/8-4-2/3
=-1+3-4-1/3-2/3+3/4+5/8-1/8
=-2-1+3/4+1/2
=-3+5/4
=-7/4
=-1又3/4
(4/5+1/3)+(1-1/5+2/3)
=(4/5+1/3)+(4/5+2/3)
=4/5+1/3+4/5+2/3
=4/5+4/5+2/3+1/3
=8/5+1
=1+3/5+1
=2+3/5
=2又3/5