Welk getal ontbreekt t/m 20?

Optellen

Oefening 1
1.	8	+		=	9
2.	6	+		=	12
3.	8	+		=	16
4.	8	+		=	9
5.	8	+		=	15
6.	9	+		=	13
7.	9	+		=	10
8.	7	+		=	12
9.	7	+		=	13
10.	7	+		=	10

Oefening 2
1.	8	+		=	13
2.	6	+		=	7
3.	9	+		=	15
4.	9	+		=	18
5.	9	+		=	11
6.	9	+		=	11
7.	9	+		=	13
8.	8	+		=	9
9.	8	+		=	15
10.	8	+		=	13

Oefening 3
1.	9	+		=	10
2.	7	+		=	11
3.	6	+		=	7
4.	7	+		=	11
5.	8	+		=	15
6.	8	+		=	14
7.	8	+		=	11
8.	8	+		=	13
9.	10	+		=	12
10.	10	+		=	19

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

Welk getal ontbreekt t/m 20?
| ANTWOORDEN

Optellen

Oefening 1
1.	8	+	1	=	9
2.	6	+	6	=	12
3.	8	+	8	=	16
4.	8	+	1	=	9
5.	8	+	7	=	15
6.	9	+	4	=	13
7.	9	+	1	=	10
8.	7	+	5	=	12
9.	7	+	6	=	13
10.	7	+	3	=	10

Oefening 2
1.	8	+	5	=	13
2.	6	+	1	=	7
3.	9	+	6	=	15
4.	9	+	9	=	18
5.	9	+	2	=	11
6.	9	+	2	=	11
7.	9	+	4	=	13
8.	8	+	1	=	9
9.	8	+	7	=	15
10.	8	+	5	=	13

Oefening 3
1.	9	+	1	=	10
2.	7	+	4	=	11
3.	6	+	1	=	7
4.	7	+	4	=	11
5.	8	+	7	=	15
6.	8	+	6	=	14
7.	8	+	3	=	11
8.	8	+	5	=	13
9.	10	+	2	=	12
10.	10	+	9	=	19

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