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LEARNING THE NUMBERS TO 20
10
11
12
13
14
15
1
10
10
10
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
10
10
10
10
5
10
+
=15
+
1
=11
+
2
=12
+
3
=13
+
4
=14
fifteen
eleven
twelve
thirteen
fourteen
10
15
12
13
14
11
10
16
17
18
19
20
1
10
10
10
10
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
10
10
10
10
10
10
+
=20
+
6
=16
+
7
=17
+
8
=18
+
9
=19
twenty
sixteen
seventeen
eighteen
nineteen
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
20
17
18
19
16
