1:
.
8
+ 6
2:
9
+ 9
3:
5
+ 8
4:
9
- 4
5:
.
12
- 6
6:
.
9
- 2
7:
.
7
+ 6
8:
9
+
3
9:
7
+ 5
10:
.
20
- 10
11:
15
- 8
12:
14
- 9
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2001 Teaching Treasures Publications