Welk getal ontbreekt t/m 20?

Optellen

Oefening 1
1.	8	+		=	14
2.	9	+		=	11
3.	4	+		=	5
4.	7	+		=	11
5.	5	+		=	9
6.	8	+		=	11
7.	10	+		=	12
8.	4	+		=	6
9.	7	+		=	9
10.	8	+		=	9

Oefening 2
1.	8	+		=	10
2.	10	+		=	18
3.	7	+		=	12
4.	9	+		=	17
5.	10	+		=	15
6.	10	+		=	11
7.	6	+		=	7
8.	9	+		=	15
9.	10	+		=	14
10.	10	+		=	14

Oefening 3
1.	6	+		=	8
2.	8	+		=	13
3.	7	+		=	10
4.	3	+		=	4
5.	6	+		=	9
6.	5	+		=	6
7.	10	+		=	14
8.	7	+		=	14
9.	8	+		=	15
10.	7	+		=	9

Oefening 4
1.	10	+		=	14
2.	10	+		=	15
3.	8	+		=	9
4.	7	+		=	13
5.	10	+		=	17
6.	6	+		=	7
7.	8	+		=	11
8.	7	+		=	9
9.	7	+		=	12
10.	5	+		=	7

Welk getal ontbreekt t/m 20?
| ANTWOORDEN

Optellen

Oefening 1
1.	8	+	6	=	14
2.	9	+	2	=	11
3.	4	+	1	=	5
4.	7	+	4	=	11
5.	5	+	4	=	9
6.	8	+	3	=	11
7.	10	+	2	=	12
8.	4	+	2	=	6
9.	7	+	2	=	9
10.	8	+	1	=	9

Oefening 2
1.	8	+	2	=	10
2.	10	+	8	=	18
3.	7	+	5	=	12
4.	9	+	8	=	17
5.	10	+	5	=	15
6.	10	+	1	=	11
7.	6	+	1	=	7
8.	9	+	6	=	15
9.	10	+	4	=	14
10.	10	+	4	=	14

Oefening 3
1.	6	+	2	=	8
2.	8	+	5	=	13
3.	7	+	3	=	10
4.	3	+	1	=	4
5.	6	+	3	=	9
6.	5	+	1	=	6
7.	10	+	4	=	14
8.	7	+	7	=	14
9.	8	+	7	=	15
10.	7	+	2	=	9

Oefening 4
1.	10	+	4	=	14
2.	10	+	5	=	15
3.	8	+	1	=	9
4.	7	+	6	=	13
5.	10	+	7	=	17
6.	6	+	1	=	7
7.	8	+	3	=	11
8.	7	+	2	=	9
9.	7	+	5	=	12
10.	5	+	2	=	7