x÷8=4.2 57﹣x=39 2x+3x=7.5
2.4÷8=
0.72÷0.8=
0.42÷0.7=
0.45÷5=
2.5×0.4=
4-0.35=
10.6+0.04=
0.17÷1.7=
1.25×0.8=
7.2÷0.4=
3 5 0 16