-x=3.9
x÷=1.5
×x=7.2
A. B. C. D.
0.58×5= 7.5×0.4= 9÷0.3=
8.1÷0.9-0.8= 53×0.5×6= 6.4÷0.01=
10×(10.1-9.8)= 6.2×101-6.2=