A) 11 7 (2 1);9 6 3 B) 1 1
1. Tính: a)
11
7
(2
1
);
9
6
3
b)1
1
: (15, 75 15 )
1
2
1
: (7
3
7, 25);
21
4
12
4
11
7
(2
1
);
9
6
3
b)1
1
: (15, 75 15 )
1
2
1
: (7
3
7, 25);
21
4
12
4