7m+0.7m=
3.14×0.22=
+0.25=
1-=
25×0.07×4=
3.14×12=
-0.3=
12.4+8.6=
3.6÷0.9=
4a+1.2a=
4×0.25÷0.25×4=
+=
-=
2-=
-=
+=
1-=
+=
+2=
0.5+=
12÷18=
1.45+6.7=
8×0.125=
23=