×21=
1-20%=
43%×100=
0.5×20%=
×6= 3×= ×= ×=
÷7= 4÷= ÷= ÷=
÷=
36÷=
×=
-=
3.4÷=
÷8=
0÷=
90%×90 =
56÷7% =
200÷20% =
0.6÷3% =
2000×3.15% =
0.72÷6% =
20×35% =
1.5÷50% =
70×(1-85%)=