2.5×3=
15×8=
2.6÷13=
1.5+0.7=
43=
1.25×3.1×0.8=
3+32=
8.7÷0.3=
29÷1000=
0.36÷12=
3x+5x=9.6 2x+8=19 4x+2.5×6=71