[r]
(1)(2)-
sai
* + = 5
* + = 0
* + 1+ = 5
*2 + < 3
(3)- s
ai
* + = 5
* + = 0
* + 1+ = 5
*2 + < 3
(4)(5)(6)(7)(8)(9)2
-
1
=
1
3
-
1
=
2
3
-
2
=
1
(10)2
1
3
2
2 + =
1 + =
3 - =
(11)2
+
1
=
3
-
=
-
=
2
1
3
(12)(13)Bài 1: Tính
1 + =
2 – =
3 – =
1 + =
3 – =
3 – = – =
3 – =
2 – =
2 1 1 2 1 2 3 1 2
2 – =
3 – =
3 – =
1 2
(14)(15)