Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
864 – 37 =
2
827
|
2.
740 + 211 =
951
2
|
3.
503 + 135 =
2
638
|
4.
609 + 377 =
2
986
|
|
5.
232 – 160 =
72
2
|
6.
214 – 31 =
2
183
|
7.
522 – 369 =
2
153
|
8.
814 – 115 =
2
699
|
|
9.
497 + 40 =
537
2
|
10.
81 + 845 =
2
926
|
11.
682 + 6 =
688
2
|
12.
141 – 1 =
140
2
|
|
13.
879 – 676 =
2
203
|
14.
73 + 647 =
720
2
|
15.
267 + 544 =
2
811
|
16.
631 + 298 =
929
2
|
|
17.
265 + 228 =
493
2
|
18.
225 – 116 =
2
109
|
19.
87 – 59 =
28
2
|
20.
402 – 74 =
2
328
|