0.3×0.3=
5×0.24=
1.5×0.4=
20×0.15=
2.4-1.6=
0.42+2.8=
0.32×0=
1-0.12=
4.2×3.6+42×0.64 -+-
123.7×-23.7× (+) +(-)
x+1.3x= 26 1.5x-1.5=1.5
1.8+0.2x=4 3.6÷1.5x=3