1、 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、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)=
3、-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-( )=-1 4-( )=1 ( )-4=-1 ( )-(-4)=1 ( )+(-4)=-1 40-( )=-1 8-(-40)= 1-(-2)= 2-5= -2-5= -2+5= -3.6+(-4)= -3.6-4= -3.6-(-4)= 3.6-(-
4、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)=