Welk getal ontbreekt t/m 20?

Aftrekken

Oefening 1
1.	20	-		=	0
2.	18	-		=	15
3.	7	-		=	0
4.	19	-		=	15
5.	20	-		=	15
6.	8	-		=	2
7.	9	-		=	8
8.	13	-		=	10
9.	7	-		=	5
10.	3	-		=	2

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

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

Oefening 4
1.	7	-		=	1
2.	14	-		=	10
3.	15	-		=	10
4.	16	-		=	10
5.	20	-		=	3
6.	9	-		=	3
7.	20	-		=	19
8.	15	-		=	1
9.	13	-		=	1
10.	5	-		=	0

Welk getal ontbreekt t/m 20?
| ANTWOORDEN

Aftrekken

Oefening 1
1.	20	-	20	=	0
2.	18	-	3	=	15
3.	7	-	7	=	0
4.	19	-	4	=	15
5.	20	-	5	=	15
6.	8	-	6	=	2
7.	9	-	1	=	8
8.	13	-	3	=	10
9.	7	-	2	=	5
10.	3	-	1	=	2

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

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

Oefening 4
1.	7	-	6	=	1
2.	14	-	4	=	10
3.	15	-	5	=	10
4.	16	-	6	=	10
5.	20	-	17	=	3
6.	9	-	6	=	3
7.	20	-	1	=	19
8.	15	-	14	=	1
9.	13	-	12	=	1
10.	5	-	5	=	0