x-30%x=14
7×=
=
4.2×=
×0.8=
×0=
1÷=
1÷×7=
0.8×50%=
÷=
2-=
16÷50%=
1-+=
25%×4=
m
12
24
n
5
△
0.25×3.2= + = 0.7÷0.01= 9.04+0.6=
-0.375= 13÷91= 10÷20%= 0.81× =