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