+=
0.8-=
-=
0÷9.2=
2.28+7.72=
0.25×4=
5÷4=
+ = - = - = 7- =
0.6×2.5= 7×0.03= 12.5÷2.5= 2.8×0.3=
4.5÷0.01= 1.8×50= 10-0.13= 0.125×0.25×32=
÷ = × ÷ × =
- = + - + =
÷0.4= + + = 1- + =