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