Welk getal ontbreekt t/m 20?

Aftrekken

Oefening 1
1.	17	-		=	12
2.	17	-		=	1
3.	13	-		=	8
4.	12	-		=	4
5.	8	-		=	2
6.	14	-		=	1
7.	18	-		=	9
8.	13	-		=	3
9.	19	-		=	17
10.	4	-		=	1

Oefening 2
1.	8	-		=	3
2.	15	-		=	3
3.	20	-		=	1
4.	17	-		=	1
5.	11	-		=	2
6.	8	-		=	4
7.	13	-		=	8
8.	18	-		=	4
9.	11	-		=	3
10.	17	-		=	13

Oefening 3
1.	17	-		=	3
2.	16	-		=	12
3.	20	-		=	1
4.	12	-		=	6
5.	16	-		=	1
6.	20	-		=	3
7.	15	-		=	14
8.	12	-		=	3
9.	18	-		=	12
10.	19	-		=	16

Oefening 4
1.	19	-		=	1
2.	10	-		=	4
3.	20	-		=	9
4.	12	-		=	10
5.	15	-		=	14
6.	10	-		=	4
7.	20	-		=	9
8.	16	-		=	13
9.	14	-		=	3
10.	13	-		=	10

Welk getal ontbreekt t/m 20?
| ANTWOORDEN

Aftrekken

Oefening 1
1.	17	-	5	=	12
2.	17	-	16	=	1
3.	13	-	5	=	8
4.	12	-	8	=	4
5.	8	-	6	=	2
6.	14	-	13	=	1
7.	18	-	9	=	9
8.	13	-	10	=	3
9.	19	-	2	=	17
10.	4	-	3	=	1

Oefening 2
1.	8	-	5	=	3
2.	15	-	12	=	3
3.	20	-	19	=	1
4.	17	-	16	=	1
5.	11	-	9	=	2
6.	8	-	4	=	4
7.	13	-	5	=	8
8.	18	-	14	=	4
9.	11	-	8	=	3
10.	17	-	4	=	13

Oefening 3
1.	17	-	14	=	3
2.	16	-	4	=	12
3.	20	-	19	=	1
4.	12	-	6	=	6
5.	16	-	15	=	1
6.	20	-	17	=	3
7.	15	-	1	=	14
8.	12	-	9	=	3
9.	18	-	6	=	12
10.	19	-	3	=	16

Oefening 4
1.	19	-	18	=	1
2.	10	-	6	=	4
3.	20	-	11	=	9
4.	12	-	2	=	10
5.	15	-	1	=	14
6.	10	-	6	=	4
7.	20	-	11	=	9
8.	16	-	3	=	13
9.	14	-	11	=	3
10.	13	-	3	=	10