①(+-)÷
②125%×3.2×25
③19.43-(9.43+6.89)
④×80%+÷1
36×50= 50×0.2= 10﹣0.86=
﹣×0= ÷3= 125%×8=
4.8÷0.8= 1﹣1÷9=
=
0.9+1=
9.8÷9.8=
0.3÷0.5=
3.2×0.1=
①0.53×2.5+
②25×0.032×12.5
③ [()×]
④6.83+17.9﹣0.83+32.1
①24×105+576÷18
②(9.88+0.24÷2)×7.6
③
④72÷[1﹣()]