460+290= 6-0.4= 15%+20%=
0.32= 0.25×40= 11b-7b=
372÷37≈ 化简比87:29=
519+199=
1.1﹣0.11=
0.9﹣0.45=
99×0.9+0.9=
0.52=
8000÷125=
6÷1%=
15÷=
0.94+0.6=
75×=
100÷5=
÷=
×25%=
12.5×0.08=
=
2.3+7.7=
100×15%=
2.5×4=
98+136=
9﹣6.2=
2.5×8=
4÷0.5=
×10%=
÷ =
7.5+ =
10×25%=
63=
300÷40=
2107﹣997=
25×28=
0.03×0.8=
49×411≈
6310÷68≈
+ =
5.4×=
﹣ =
6×3.14=
39%+28%=
1﹣16%﹣54%=