Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
686 – 416 =
2
270
|
2.
313 – 284 =
2
29
|
3.
989 – 453 =
2
536
|
4.
363 + 562 =
2
925
|
|
5.
826 + 2 =
2
828
|
6.
21 + 83 =
2
104
|
7.
409 + 363 =
772
2
|
8.
769 + 179 =
948
2
|
|
9.
973 – 483 =
490
2
|
10.
57 – 34 =
2
23
|
11.
81 + 470 =
2
551
|
12.
580 – 555 =
2
25
|
|
13.
587 – 100 =
487
2
|
14.
933 – 738 =
195
2
|
15.
750 + 45 =
795
2
|
16.
517 + 455 =
2
972
|
|
17.
425 – 317 =
108
2
|
18.
771 + 166 =
937
2
|
19.
829 – 176 =
653
2
|
20.
492 – 166 =
326
2
|