Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
977 – 16 =
2
961
|
2.
505 + 251 =
2
756
|
3.
616 + 226 =
2
842
|
4.
409 + 86 =
495
2
|
|
5.
372 + 199 =
2
571
|
6.
656 – 305 =
351
2
|
7.
206 – 54 =
152
2
|
8.
896 – 878 =
2
18
|
|
9.
918 + 80 =
998
2
|
10.
171 + 136 =
2
307
|
11.
234 + 253 =
487
2
|
12.
134 – 105 =
2
29
|
|
13.
653 + 274 =
2
927
|
14.
293 – 82 =
211
2
|
15.
322 – 240 =
2
82
|
16.
712 – 463 =
249
2
|
|
17.
53 + 866 =
919
2
|
18.
217 + 72 =
289
2
|
19.
525 + 287 =
812
2
|
20.
307 + 620 =
927
2
|