Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
409 – 202 =
207
2
|
2.
530 – 199 =
331
2
|
3.
422 + 414 =
836
2
|
4.
778 + 198 =
2
976
|
|
5.
516 – 392 =
2
124
|
6.
449 – 123 =
2
326
|
7.
264 – 40 =
224
2
|
8.
957 – 532 =
2
425
|
|
9.
874 + 37 =
911
2
|
10.
21 – 7 =
1
14
|
11.
245 – 155 =
90
2
|
12.
925 + 8 =
2
933
|
|
13.
406 + 68 =
2
474
|
14.
689 – 410 =
279
2
|
15.
939 – 696 =
243
2
|
16.
989 + 6 =
995
2
|
|
17.
78 + 776 =
2
854
|
18.
159 + 48 =
2
207
|
19.
540 + 306 =
2
846
|
20.
512 – 219 =
293
2
|