6.78-0.42=
13×30%=
÷3=
220÷11=
①=
②=
③=
④=
⑤=
⑥=
⑦59×41≈
⑧632÷69≈
7.5×100=
1.3+2.4=
25×40=
630÷90=
4.8×=
÷14=
25+85= 73.9-39.6= = =
18÷6= 798+205≈ 632÷69≈ 803-207≈
2.87+6.3=
7÷1.4=
1﹣0.32=
÷4=
:0.75=
0.4÷40%=
2.5×0.4=
× =
36×25%=