810÷30= 0.38+3.8= 0.15×0.2=
÷= ﹣×0= ×3÷3×=
1﹣1÷2=
2.5+3.8=
0.4×3.1×2.5=
5.34+0.66=
101×30=
0.4+6.0=
+=
5÷0.05=
×=
-=
13÷=
54×=
8.4-5.6= 1.25×0.08= ÷8=
4÷0.2= 50×4%= 7× ÷7× =
187﹣28= 42.7+3= 0.622=
515÷5= 12.5%×8= =