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