Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
214 – 167 =
47
2
|
2.
639 – 509 =
130
2
|
3.
800 + 124 =
924
2
|
4.
158 + 707 =
2
865
|
|
5.
493 – 167 =
2
326
|
6.
402 – 9 =
393
2
|
7.
175 + 682 =
857
2
|
8.
719 + 222 =
2
941
|
|
9.
184 – 143 =
41
2
|
10.
534 + 259 =
793
2
|
11.
588 + 401 =
989
2
|
12.
321 + 126 =
447
2
|
|
13.
241 – 180 =
2
61
|
14.
604 – 336 =
268
2
|
15.
854 – 540 =
314
2
|
16.
114 + 387 =
501
2
|
|
17.
215 + 258 =
2
473
|
18.
166 + 59 =
2
225
|
19.
753 + 108 =
2
861
|
20.
81 – 1 =
80
2
|