câu 1 : so sánh > , < , =
1/2 2/3 5/2 6/3 11/4 19/10 12/27 1212/2727 13/33 143/363 7/8 14/16 3/7 5/7
cau 2 : tinh gia tri cua bieu thuc bang cach hop li nhat
132 x 34 x 7
__________ =
24 x 35 x22
8 x 15 x 42
_________ =
6 x 21 x 45
3 x 4 x 30 x 56
____________ =
9 x 8 x 7 x 8 x 20