Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
557 – 251 =
2
306
|
2.
215 – 185 =
30
2
|
3.
391 + 542 =
2
933
|
4.
211 – 182 =
2
29
|
|
5.
661 – 429 =
2
232
|
6.
752 + 56 =
808
2
|
7.
290 – 53 =
237
2
|
8.
253 + 506 =
759
2
|
|
9.
48 + 802 =
2
850
|
10.
92 – 41 =
2
51
|
11.
922 – 320 =
602
2
|
12.
328 + 84 =
412
2
|
|
13.
36 – 12 =
2
24
|
14.
245 + 138 =
383
2
|
15.
63 – 7 =
2
56
|
16.
443 + 402 =
2
845
|
|
17.
885 – 60 =
2
825
|
18.
585 + 165 =
2
750
|
19.
647 + 203 =
850
2
|
20.
709 – 328 =
381
2
|