初一有理数的加减法过程也写一下!(1).23+(-17)+6+(-22) (2.) (-2)+3+1(-3)+2+(-4) (3) 1+(-1/20)+1/3+(-1/6) (4.) 3又1/4+(-2又3/5)+5又3/4+(-8
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初一有理数的加减法过程也写一下!(1).23+(-17)+6+(-22) (2.) (-2)+3+1(-3)+2+(-4) (3) 1+(-1/20)+1/3+(-1/6) (4.) 3又1/4+(-2又3/5)+5又3/4+(-8
初一有理数的加减法
过程也写一下!(1).23+(-17)+6+(-22)
(2.) (-2)+3+1(-3)+2+(-4)
(3) 1+(-1/20)+1/3+(-1/6)
(4.) 3又1/4+(-2又3/5)+5又3/4+(-8又2/50)
(5.) (-8)+10+2+(-1)
(6) 5+(-6)+3+9+(-4)+-(7)
(7.) (-0.8)+1.2+(-0.7)+(-2.1)+0.8+3.5
(8). 1/2+(-2/3)+4/5+(-1/2)+(1/3)
要写下过程 过程!
初一有理数的加减法过程也写一下!(1).23+(-17)+6+(-22) (2.) (-2)+3+1(-3)+2+(-4) (3) 1+(-1/20)+1/3+(-1/6) (4.) 3又1/4+(-2又3/5)+5又3/4+(-8
(1)23+(-17)+6+(-22)
=23-17+6-22
=-10
(2)(-2)+3+1(-3)+2+(-4)
=-2+3-3+2-4
=-4
(3) 1+(-1/20)+1/3+(-1/6)
=1-1/20+1/3-1/6
=1-3/60+20/60-10/60
=1-7/60
=53/60
(4) 3又1/4+(-2又3/5)+5又3/4+(-8又2/50)
=3又1/4-2又3/5+5又3/4-8又2/50
= 3又1/4+5又3/4-2又3/5-8又2/50
=9-10又25分之16
=-1又25分之16
(5) (-8)+10+2+(-1)
=-8+10+2-1
=3
(6) 5+(-6)+3+9+(-4)+-(7)
=5-6+3+9-4-7
=0
(7) (-0.8)+1.2+(-0.7)+(-2.1)+0.8+3.5
=-0.8+1.2-0.7-2.1+0.8+3.5
=5.1
(8) 1/2+(-2/3)+4/5+(-1/2)+(1/3)
=1/2-2/3+4/5-1/2+1/3
=1/2-1/2-2/3+1/3+4/5
=-1/3+4/5
=7/15