1.2÷12%=
9﹣1.9=
7.2÷6=
0.24× =
÷ =
3.14×22=
﹣ =
1+30%=
+ =
0.52=
+0.625=
1÷0.05=
×8.1=
1÷ =
0.1÷10%=
a﹣ a=
46+25= 840÷60= 0.25×8= 2﹣= 4÷12=
15×20= ÷= 1×= 80×110%= 401÷50≈
2.5×4= ×= ÷= ﹣0.25=
﹣= 1﹣﹣= 1÷20%= 80%×=
3.1+0.4= += 640÷16= ×3×4=
10÷= ×= 2.4×= 25×40%=