Oefen erbijsommen en erafsommen tot 1.000
In de mix
1.
140
160
jimmy
+
=
2.
120
0
jimmy
+
=
3.
540
460
jimmy
+
=
4.
220
200
jimmy
–
=
5.
520
260
jimmy
+
=
6.
840
100
jimmy
+
=
7.
340
220
jimmy
–
=
8.
160
120
jimmy
–
=
9.
400
280
jimmy
–
=
10.
180
320
jimmy
+
=
11.
700
540
jimmy
–
=
12.
920
340
jimmy
–
=
13.
500
180
jimmy
+
=
14.
680
340
jimmy
–
=
15.
620
400
jimmy
–
=
16.
140
400
jimmy
+
=
17.
960
600
jimmy
–
=
18.
480
180
jimmy
–
=
19.
340
140
jimmy
–
=
20.
960
440
jimmy
–
=
21.
840
20
jimmy
+
=
22.
120
200
jimmy
+
=
23.
160
40
jimmy
+
=
24.
520
360
jimmy
+
=
Oefen erbijsommen en erafsommen tot 1.000
| ANTWOORDEN
In de mix
1.
140
160
300
+
=
2.
120
0
120
+
=
3.
540
460
1000
+
=
4.
220
200
20
–
=
5.
520
260
780
+
=
6.
840
100
940
+
=
7.
340
220
120
–
=
8.
160
120
40
–
=
9.
400
280
120
–
=
10.
180
320
500
+
=
11.
700
540
160
–
=
12.
920
340
580
–
=
13.
500
180
680
+
=
14.
680
340
340
–
=
15.
620
400
220
–
=
16.
140
400
540
+
=
17.
960
600
360
–
=
18.
480
180
300
–
=
19.
340
140
200
–
=
20.
960
440
520
–
=
21.
840
20
860
+
=
22.
120
200
320
+
=
23.
160
40
200
+
=
24.
520
360
880
+
=