Welk getal ontbreekt t/m 20?

Optellen

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

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

Oefening 3
1.	7	+		=	11
2.	8	+		=	10
3.	10	+		=	11
4.	7	+		=	13
5.	8	+		=	15
6.	10	+		=	13
7.	10	+		=	14
8.	7	+		=	13
9.	10	+		=	16
10.	7	+		=	14

Oefening 4
1.	9	+		=	11
2.	9	+		=	18
3.	10	+		=	18
4.	3	+		=	4
5.	4	+		=	8
6.	7	+		=	13
7.	5	+		=	7
8.	4	+		=	7
9.	8	+		=	12
10.	8	+		=	12

Welk getal ontbreekt t/m 20?
| ANTWOORDEN

Optellen

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

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

Oefening 3
1.	7	+	4	=	11
2.	8	+	2	=	10
3.	10	+	1	=	11
4.	7	+	6	=	13
5.	8	+	7	=	15
6.	10	+	3	=	13
7.	10	+	4	=	14
8.	7	+	6	=	13
9.	10	+	6	=	16
10.	7	+	7	=	14

Oefening 4
1.	9	+	2	=	11
2.	9	+	9	=	18
3.	10	+	8	=	18
4.	3	+	1	=	4
5.	4	+	4	=	8
6.	7	+	6	=	13
7.	5	+	2	=	7
8.	4	+	3	=	7
9.	8	+	4	=	12
10.	8	+	4	=	12