Oefen erbijsommen en erafsommen tot 20
In de mix
1.
2
7
jimmy
+
=
2.
8
2
jimmy
–
=
3.
12
1
jimmy
+
=
4.
15
15
jimmy
–
=
5.
1
18
jimmy
+
=
6.
1
1
jimmy
–
=
7.
3
1
jimmy
–
=
8.
14
6
jimmy
+
=
9.
13
3
jimmy
–
=
10.
15
0
jimmy
+
=
11.
6
6
jimmy
+
=
12.
18
2
jimmy
+
=
13.
16
10
jimmy
–
=
14.
6
2
jimmy
–
=
15.
18
1
jimmy
+
=
16.
10
7
jimmy
+
=
17.
12
5
jimmy
+
=
18.
16
4
jimmy
+
=
19.
20
10
jimmy
–
=
20.
20
0
jimmy
+
=
21.
12
8
jimmy
+
=
22.
8
3
jimmy
+
=
23.
15
1
jimmy
+
=
24.
7
12
jimmy
+
=
Oefen erbijsommen en erafsommen tot 20
| ANTWOORDEN
In de mix
1.
2
7
9
+
=
2.
8
2
6
–
=
3.
12
1
13
+
=
4.
15
15
0
–
=
5.
1
18
19
+
=
6.
1
1
0
–
=
7.
3
1
2
–
=
8.
14
6
20
+
=
9.
13
3
10
–
=
10.
15
0
15
+
=
11.
6
6
12
+
=
12.
18
2
20
+
=
13.
16
10
6
–
=
14.
6
2
4
–
=
15.
18
1
19
+
=
16.
10
7
17
+
=
17.
12
5
17
+
=
18.
16
4
20
+
=
19.
20
10
10
–
=
20.
20
0
20
+
=
21.
12
8
20
+
=
22.
8
3
11
+
=
23.
15
1
16
+
=
24.
7
12
19
+
=