2.87+6.3=
7÷1.4=
1﹣0.32=
÷4=
:0.75=
0.4÷40%=
2.5×0.4=
× =
36×25%=
①4.38-1.56+0.62-0.44
②0.4×270×2.5
③(40+1.25)×8
④(12.5-0.05)×8
⑤2.6×8.5+8.5×7.4
⑥9.9×6.9-6.9×3.9