Welk getal ontbreekt t/m 40?

Optellen

Oefening 1
1.	18	+		=	28
2.	17	+		=	33
3.	16	+		=	27
4.	20	+		=	32
5.	20	+		=	28
6.	18	+		=	29
7.	11	+		=	13
8.	6	+		=	7
9.	17	+		=	18
10.	20	+		=	35

Oefening 2
1.	16	+		=	31
2.	15	+		=	21
3.	16	+		=	27
4.	5	+		=	6
5.	9	+		=	14
6.	17	+		=	18
7.	18	+		=	33
8.	19	+		=	20
9.	4	+		=	7
10.	18	+		=	21

Oefening 3
1.	8	+		=	16
2.	20	+		=	39
3.	19	+		=	32
4.	19	+		=	29
5.	18	+		=	35
6.	12	+		=	23
7.	15	+		=	21
8.	17	+		=	27
9.	16	+		=	28
10.	7	+		=	11

Oefening 4
1.	18	+		=	34
2.	13	+		=	24
3.	18	+		=	34
4.	18	+		=	26
5.	13	+		=	16
6.	11	+		=	20
7.	15	+		=	25
8.	18	+		=	33
9.	7	+		=	12
10.	11	+		=	22

Welk getal ontbreekt t/m 40?
| ANTWOORDEN

Optellen

Oefening 1
1.	18	+	10	=	28
2.	17	+	16	=	33
3.	16	+	11	=	27
4.	20	+	12	=	32
5.	20	+	8	=	28
6.	18	+	11	=	29
7.	11	+	2	=	13
8.	6	+	1	=	7
9.	17	+	1	=	18
10.	20	+	15	=	35

Oefening 2
1.	16	+	15	=	31
2.	15	+	6	=	21
3.	16	+	11	=	27
4.	5	+	1	=	6
5.	9	+	5	=	14
6.	17	+	1	=	18
7.	18	+	15	=	33
8.	19	+	1	=	20
9.	4	+	3	=	7
10.	18	+	3	=	21

Oefening 3
1.	8	+	8	=	16
2.	20	+	19	=	39
3.	19	+	13	=	32
4.	19	+	10	=	29
5.	18	+	17	=	35
6.	12	+	11	=	23
7.	15	+	6	=	21
8.	17	+	10	=	27
9.	16	+	12	=	28
10.	7	+	4	=	11

Oefening 4
1.	18	+	16	=	34
2.	13	+	11	=	24
3.	18	+	16	=	34
4.	18	+	8	=	26
5.	13	+	3	=	16
6.	11	+	9	=	20
7.	15	+	10	=	25
8.	18	+	15	=	33
9.	7	+	5	=	12
10.	11	+	11	=	22