Share dodawanie i odejmowanie do 20
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17 - 2 =
14
15
17
16
12 + 5 =
20
18
116
17
19 - 6 =
12
15
14
13
11+ 8 =
19
20
18
17
20 - 8 =
12
11
14
13
11 + 9 =
19
18
20
21
14 + 6 =
18
20
19
21
19 - 8 =
13
10
12
11
14 + 5 =
20
17
18
19
12+8
20
19
17
21
15-8
7
13+3
16
20-9
11
6+6
12
7+8
15
9+9
18
