有理数加减法口算百题2-3=0-(-1)=+9-6=(-34)+(+89)=-21-(+4)=70-90=-5+(+6)=1-89=(+56)-(+73)=12-(+9)=-(-6)+8=20+(+7)=(-12)-(-9)=-6+9=+3-(-54)=-3+(+7)=9-(-1/4)=3.2-8=66-88=-66-(+88)=-66+88=(-36)-7=(-36)-(-7)=(-36)+(+7)=丨-2丨+(-4)=-(+7)-(+8)=+9-(-7)=+9-(+7)=-2-(+9)=15-(-8)=-2-(-9)=-2+(+9)=-2+9=-81+29=23-35=-4+6=-3-4=8/9-16/15=-3/4+2=-1.2+(-2/3)=-1÷(+1.2)=丨-72丨-(-2)=+5-(-6)=丨-9+3丨=-(+5)-(+8)=-3+()=-7丨-6丨+()=-9()+(-30)=-40()-30=40丨-3丨+(-3)=-6+()=-9-6-()=-9-12=()+(-5)2/9-(+5)=+7+()=-2-3.2+(+1/3)=()-7=-27(-35)-(+35)=+35-(-35)=-2-(-4)=-6-丨-3丨=-25-(+26)=-5-6=+8+(-5)=-8-9=-2-(-5)=-78+6=-78+(+6)=-78+(-6)=-78-(+6)=8-90=-78-(-6)=+78+(+6)=+78+(-6)=+78-(+6)=+78-(-6)=-9+7=78-6=78-(-6)=4-()=-14-()=1()-4=-1()-(-4)=1()+(-4)=-140-()=-18-(-40)=1-(-2)=2-5=-2-5=-2+5=-3.6+(-4)=-3.6-4=-3.6-(-4)=3.6-(-4)=+3.6-(-4)=+3.6+(+4)=-9.2-()=-2.6+2.3-()=5.4-2.3-()=-5.4丨-3丨+丨-3丨=-丨-3丨+(-3)=-22-丨-3丨=丨-3丨+(-3.1)=(-6)-丨-3丨=8-12=8-(-12)=8-(+12)=8+(-12)=-8-(-12)=-8-(+12)=30-67=-30+67=-4.5+2.7=-8-14=-8+(-14)=(-8)-(-14)=2-7=+7-2=-7-2=1-2+3-4=-1+2-3+4=8+(-30)-(-6)=-2-3-5-6=(+7)+(+5)+(+2)=+6-(+2)-(-9)+(-4)=