Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
51 + 722 =
2
773
|
2.
51 – 27 =
24
2
|
3.
336 – 186 =
150
2
|
4.
259 + 176 =
435
2
|
|
5.
808 – 594 =
214
2
|
6.
757 – 279 =
478
2
|
7.
740 + 248 =
2
988
|
8.
730 – 30 =
700
2
|
|
9.
825 + 38 =
2
863
|
10.
404 – 59 =
2
345
|
11.
642 – 386 =
256
2
|
12.
551 + 418 =
2
969
|
|
13.
129 – 129 =
0
2
|
14.
936 – 453 =
2
483
|
15.
696 + 31 =
727
2
|
16.
353 – 34 =
319
2
|
|
17.
317 – 39 =
278
2
|
18.
821 + 101 =
922
2
|
19.
215 + 248 =
463
2
|
20.
322 – 123 =
2
199
|