Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
555 – 495 =
2
60
|
2.
492 – 440 =
2
52
|
3.
794 – 789 =
1
5
|
4.
19 – 10 =
9
1
|
|
5.
20 + 774 =
2
794
|
6.
696 + 185 =
2
881
|
7.
426 + 34 =
2
460
|
8.
692 – 73 =
619
2
|
|
9.
994 + 1 =
2
995
|
10.
61 + 474 =
535
2
|
11.
138 – 71 =
67
2
|
12.
567 – 207 =
2
360
|
|
13.
971 + 19 =
2
990
|
14.
92 + 645 =
737
2
|
15.
844 – 246 =
2
598
|
16.
414 – 384 =
2
30
|
|
17.
734 – 713 =
2
21
|
18.
652 + 55 =
707
2
|
19.
724 – 681 =
43
2
|
20.
625 – 571 =
2
54
|