①12%x+23%x=210
②14-120%x=5
③85%-2X = 25%
④25%x-90%×=9.6÷12
1.47+5.3=
0×99=
9.9÷11=
0.3×3.6=
1÷0.5=
2.8÷1.4×0.2=
-0.375=
5-=
0.32÷10%=
20平方厘米0.2平方分米 1.5×2.81.05×2.8 99×99100×99-1
①x-x=2
②=6:x