Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
520 + 368 =
2
888
|
2.
134 – 102 =
32
2
|
3.
776 – 687 =
89
2
|
4.
390 – 197 =
193
2
|
|
5.
578 – 177 =
2
401
|
6.
410 – 294 =
2
116
|
7.
145 – 122 =
23
2
|
8.
131 – 101 =
2
30
|
|
9.
879 + 79 =
2
958
|
10.
646 – 414 =
232
2
|
11.
913 + 69 =
982
2
|
12.
145 – 76 =
2
69
|
|
13.
235 – 88 =
2
147
|
14.
7 + 214 =
2
221
|
15.
572 + 239 =
811
2
|
16.
86 + 181 =
2
267
|
|
17.
872 – 534 =
2
338
|
18.
516 + 372 =
888
2
|
19.
900 – 423 =
477
2
|
20.
864 – 359 =
2
505
|