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