0.89﹣0.25= 1﹣0.98= 8.8﹣6.7= 5×400=
3.04+7.6= 1.23÷3= 0.4×0.06= 0÷1.89=
0.36÷3= 0.05×6= 4﹣0.32= 2.5÷5=
6.3÷0.07= 37.4÷100= 0.85﹣0.8= 0.4×25=
①6.91+19.2÷2.56
②12.5×8.8
③9.2÷0.25÷4