28.7-14.7+1.4
21÷3.5+21÷1.5
56.14÷3.5÷2
6.17×13.6+1.36×( )(填数使它可简便计算)
4.2x-2.6x=4.88
5(20x+1.5)=17.5
5.5×0.02=
0×0.964=
0.5×2.4=
40×0.09=
0.8×0.04=
0.36×2=
3.3×0.3=
0.125×0.8=
0.8×0.7=
0.14×0.3=
3.2×0.3=
0.16×0.5=
①16.2÷9-0.85
②13×6.5+6.5×7
③(3.94+7.76)÷0.78
④2.4÷1.25÷0.8
0.02×9=( )