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200 problems of rational number subtraction oral calculation
+9-6= (-34)+(+89)= -2 1-(+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=

-8 1+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.