Welk getal ontbreekt t/m 20?

Optellen

Oefening 1
1.	10	+		=	17
2.	10	+		=	14
3.	6	+		=	9
4.	7	+		=	11
5.	7	+		=	8
6.	10	+		=	17
7.	5	+		=	8
8.	8	+		=	11
9.	7	+		=	8
10.	10	+		=	17

Oefening 2
1.	8	+		=	13
2.	10	+		=	18
3.	8	+		=	15
4.	8	+		=	9
5.	10	+		=	13
6.	10	+		=	16
7.	6	+		=	9
8.	3	+		=	4
9.	3	+		=	5
10.	4	+		=	7

Oefening 3
1.	8	+		=	15
2.	8	+		=	9
3.	3	+		=	4
4.	5	+		=	8
5.	6	+		=	11
6.	6	+		=	12
7.	7	+		=	12
8.	10	+		=	11
9.	7	+		=	10
10.	1	+		=	2

Oefening 4
1.	8	+		=	12
2.	10	+		=	11
3.	9	+		=	11
4.	8	+		=	12
5.	9	+		=	17
6.	3	+		=	6
7.	3	+		=	4
8.	7	+		=	9
9.	9	+		=	10
10.	7	+		=	13

Welk getal ontbreekt t/m 20?
| ANTWOORDEN

Optellen

Oefening 1
1.	10	+	7	=	17
2.	10	+	4	=	14
3.	6	+	3	=	9
4.	7	+	4	=	11
5.	7	+	1	=	8
6.	10	+	7	=	17
7.	5	+	3	=	8
8.	8	+	3	=	11
9.	7	+	1	=	8
10.	10	+	7	=	17

Oefening 2
1.	8	+	5	=	13
2.	10	+	8	=	18
3.	8	+	7	=	15
4.	8	+	1	=	9
5.	10	+	3	=	13
6.	10	+	6	=	16
7.	6	+	3	=	9
8.	3	+	1	=	4
9.	3	+	2	=	5
10.	4	+	3	=	7

Oefening 3
1.	8	+	7	=	15
2.	8	+	1	=	9
3.	3	+	1	=	4
4.	5	+	3	=	8
5.	6	+	5	=	11
6.	6	+	6	=	12
7.	7	+	5	=	12
8.	10	+	1	=	11
9.	7	+	3	=	10
10.	1	+	1	=	2

Oefening 4
1.	8	+	4	=	12
2.	10	+	1	=	11
3.	9	+	2	=	11
4.	8	+	4	=	12
5.	9	+	8	=	17
6.	3	+	3	=	6
7.	3	+	1	=	4
8.	7	+	2	=	9
9.	9	+	1	=	10
10.	7	+	6	=	13