50÷100=
=
2.5
6×= 2-=
7m+0.7m=
3.14×0.22=
+0.25=
1-=
25×0.07×4=
3.14×12=
-0.3=
1-0.001= 1÷4= 0.9+0.1÷0.1=
9÷0.6= 12×0.05= 1.4-1.4÷7=
2.5×4×0.8= 3.6÷0.7≈ (得数保留一位小数)