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有理数加减

(1) (-9)-(-13)+(-20)+(-2)(2) 3+13-(-7)/6(3) (-2)-8-14-13(4) (-7)*(-1)/7+8(5) (-11)*4-(-18)/18(6) 4+(-11)-1/(-3)(7) (-17)-6-16/(-18)(8) 5/7+(-1)-(-8)(9) (-1)*(-1)+15+1(10) 3-(-5)*3/(-15)(11) 6*(-14)-(-14)+(-13)(12) (-15)*(-13)-(-17)-(-4)(13) (-20)/13/(-7)+11(14)

-38)+52+118+(-62)= (-32)+68+(-29)+(-68)= (-21)+251+21+(-151)= 12+35+(-23)+0= (-6)+8+(-4)+12 = 27+(-26)+33+(-27) 12+35+(-23)+0= 39+[-23]+0+[-16]= [-18]+29+[-52]+60

5+(-9)=-4(-11)+99=881+(-5)=-416+(-12)=412+(-74)=-621+(-1)=0(-5)+4=-1(-2)+89=87(-1)+0=-1(-5)+8=3(-56)+88=32(-23)+66=43(-3)+2=-1(-9)+1=-8(-6)+68=62(-57)+67=10(-

1、(+16)+(-29)-(-7)-(+11)+(+9) 2、(-3.1)-(-4.5)+(4.4)-(+1.3)+(2.5)3、(+1/2)-(+5)+(-1/3)+(+1/4)+(+5 2/3)4、(-2 2/5)-(-4.7)-(+0.5)+(+2.4)+(-3.2)

有理数混合运算1) (-9)-(-13)+(-20)+(-2)(2) 3+13-(-7)/6(3) (-2)-8-14-13(4) (-7)*(-1)/7+8(5) (-11)*4-(-18)/18(6) 4+(-11)-1/(-3)(7) (-17)-6-16/(-18)(8) 5/7+(-1)-(-8)(9) (-1)*(-1)+15+1(10) 3-(-5)*3/(-15)(1

(1)(-8)+10+2+(-1)=-8+10+2-1=3(2)25+(-12)+(-17)-(-6)=25-12-17+6=2(3)(-0.8)+1.2+(-0.7)+(-2.1)=-0.8+1.2-0.7-2.1=-1.7(4)5.6+(-0.9)+4.4=(-8.1)=10+(-9)=1(5)5+(-6)+3+9+(-4)+(-7)=17+(-17)=0(6)0+(-3.17)+(-5)+(+1.17)=[-(3.

1 2 3 4的加减法,就是小学学的算数

1.(-8)-(-1)=(-8)+1=-7 2.45+(-30)=45-30=15 3.-1.5-(-11.5)=-1.5+11.5=10 4.-1/4-(-1/2)=-1/4+1/2=-1/4+2/4=1/4 5.15-[1-(20-4)]15-(1-16)=15-(-15)=15+15=30 6.-40-28-(-19)+(-24)

①-7/5 +(+ 1/10) =-1.3 ②90-(-3)=93 ③-0.5-(-3 )+2.75-(+7 ) =-0.75 ④ (-2.8)+(+1.9)=-0.91)(-9)-(-13)+(-20)+(-2)=-18(2) 3+13-(-7)÷6=17又6分之1(3) (-2)-8-14-13=-37(4) (-7)*(-1) ÷7+8 =9(5) (-11)*4-(-18) ÷18 =-43(-38)+52+118+(-62)=70 (-32)+68+(-29)+

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