给我出20道有理数加减法,给高分,要步骤和答案
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给我出20道有理数加减法,给高分,要步骤和答案
跪求呀,10道也可以!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!混和计算也可以!!!拜托了!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
跪求呀,10道也可以!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!混和计算也可以!!!拜托了!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
①-7/5 +(+ 1/10)
=-1.4+0.1
=-1.3
②90-(-3)
=90+3
=93
③-0.5-(-3 )+2.75-(+7 )
=0.5+3+2.75-7
=6.25-7
=-0.75
④ (-2.8)+(+1.9)
=-2.8+1.9
=-0.9
就类似的,换换娄
-09+1.1-(0.2)+1/5-3/4
=0.2-0.2+0.2-0.75
=0.95
1又1/2-3又4/5-(-2.5)
=1.5+2.5-3.8
=4-3.8
=0.2
1)(-9)-(-13)+(-20)+(-2)
= -9+13-20-2
=-18
(2) 3+13-(-7)÷6
= 3+13+7/6
=17又6分之1
(3) (-2)-8-14-13
= -2-8-14-13
=-10-14-13
=-24-13
=-37
(4) (-7)×(-1) ÷7+8
=7÷7+8
=1+8
=9
(5) (-11)×4-(-18) ÷18
=-44+1
=-43
再问: 还有么?
再答: (-38)+52+118+(-62) = (-38-62)+(52+118) =-100+170 =70 (-32)+68+(-29)+(-68) = (-32-29)+(68-68) =-61 (-21)+251+21+(-151) = (-21+21)+(251-251) =0 12+35+(-23)+0 = 37-23 =14 (-6)+8+(-4)+12 = 2-4+12 =-2+12 =10 27+(-26)+33+(-27) =1+33-27 =34-27 =7 39+[-23]+0+[-16] = 16+0-16 =16-16 =0 [-18]+29+[-52]+60 = 18+23+52+60 =41+52+60 =93+60 =153 [-3]+[-2]+[-1]+0+1+2 =3+2+1+0+1+2 =9 (-301)+125+301+(-75) = (-301+301)+(125-75) =0+50 =50 1-4/9 = 5/9 1-7/10=3/10 8/15-5= -4又7/15 7-15=-8 2/8-5/8=-3/8 11/12-10/12= -1/12 42-(3+3 ) = 42-6 =36 1/3- 7/12-7/18 =12/36-21/36-14/36 =(12-21-14)/36 =-23/36 1 -1/3-1 1/5 =2/3-1/5 =10/15-3/15 =7/15 10-7/10= 9又3/10 5/24+3/8 =5/24+9/24 =14/24 =7/8 1-3/5=2/5 4.39x1/13x2/3 =3x2/3 =2 1+(-2)+(-3)+4+5+(-6)+(-7)+8+9+(-10)+(-11)+12 =-1-3+4+5-6-7+8+9-10-11+12 =-4+4+5-6-7+8+9-10-11+12 =5-6-7+8+9-10-11+12 =-1-7+8+9-10-11+12 =-8+8+9-10-11+12 =9-10-11+12 =-1-11+12 =-12+12 =0 (-7分之1)+(-7分之2)+1又7分之3 =-7分之3+1又7分之3 =1
=-1.4+0.1
=-1.3
②90-(-3)
=90+3
=93
③-0.5-(-3 )+2.75-(+7 )
=0.5+3+2.75-7
=6.25-7
=-0.75
④ (-2.8)+(+1.9)
=-2.8+1.9
=-0.9
就类似的,换换娄
-09+1.1-(0.2)+1/5-3/4
=0.2-0.2+0.2-0.75
=0.95
1又1/2-3又4/5-(-2.5)
=1.5+2.5-3.8
=4-3.8
=0.2
1)(-9)-(-13)+(-20)+(-2)
= -9+13-20-2
=-18
(2) 3+13-(-7)÷6
= 3+13+7/6
=17又6分之1
(3) (-2)-8-14-13
= -2-8-14-13
=-10-14-13
=-24-13
=-37
(4) (-7)×(-1) ÷7+8
=7÷7+8
=1+8
=9
(5) (-11)×4-(-18) ÷18
=-44+1
=-43
再问: 还有么?
再答: (-38)+52+118+(-62) = (-38-62)+(52+118) =-100+170 =70 (-32)+68+(-29)+(-68) = (-32-29)+(68-68) =-61 (-21)+251+21+(-151) = (-21+21)+(251-251) =0 12+35+(-23)+0 = 37-23 =14 (-6)+8+(-4)+12 = 2-4+12 =-2+12 =10 27+(-26)+33+(-27) =1+33-27 =34-27 =7 39+[-23]+0+[-16] = 16+0-16 =16-16 =0 [-18]+29+[-52]+60 = 18+23+52+60 =41+52+60 =93+60 =153 [-3]+[-2]+[-1]+0+1+2 =3+2+1+0+1+2 =9 (-301)+125+301+(-75) = (-301+301)+(125-75) =0+50 =50 1-4/9 = 5/9 1-7/10=3/10 8/15-5= -4又7/15 7-15=-8 2/8-5/8=-3/8 11/12-10/12= -1/12 42-(3+3 ) = 42-6 =36 1/3- 7/12-7/18 =12/36-21/36-14/36 =(12-21-14)/36 =-23/36 1 -1/3-1 1/5 =2/3-1/5 =10/15-3/15 =7/15 10-7/10= 9又3/10 5/24+3/8 =5/24+9/24 =14/24 =7/8 1-3/5=2/5 4.39x1/13x2/3 =3x2/3 =2 1+(-2)+(-3)+4+5+(-6)+(-7)+8+9+(-10)+(-11)+12 =-1-3+4+5-6-7+8+9-10-11+12 =-4+4+5-6-7+8+9-10-11+12 =5-6-7+8+9-10-11+12 =-1-7+8+9-10-11+12 =-8+8+9-10-11+12 =9-10-11+12 =-1-11+12 =-12+12 =0 (-7分之1)+(-7分之2)+1又7分之3 =-7分之3+1又7分之3 =1
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