+ = - = 0× = × =
12× = + = × = 1- + =
2x+5=17 3(x-2)=12
0.8×5=
7.6×10=
0.25+0.5=
4.7-0.7=
1.2×5=
9÷0.3=
0.25a+0.5a=
7.8÷6=
1.2×0.5=
7-1.99=
62.4-4=
0.25a+0.05×2=
33=
0.5+=
-0.5=