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