0,123
0,05
3,529
0.07
2,89
3,494
1/2+2/3=7/6
100k
thiếu dữ kiện rồi
(32)9:(33)3=318:39=39
33.35=38
21/8.x=3/8+5/4
x=13/8:21/8
x=13/21
45/8:5/2-7/4.2/10
9/4-7/20
=19/10