Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
809 – 445 =
364
2
|
2.
818 – 34 =
784
2
|
3.
207 – 148 =
59
2
|
4.
417 – 131 =
2
286
|
|
5.
607 + 141 =
748
2
|
6.
177 + 596 =
773
2
|
7.
698 – 604 =
2
94
|
8.
137 – 16 =
121
2
|
|
9.
845 + 58 =
903
2
|
10.
580 – 41 =
539
2
|
11.
489 + 83 =
572
2
|
12.
405 – 3 =
2
402
|
|
13.
506 – 20 =
486
2
|
14.
403 + 284 =
2
687
|
15.
816 + 168 =
2
984
|
16.
874 + 84 =
2
958
|
|
17.
59 + 756 =
815
2
|
18.
406 – 237 =
2
169
|
19.
296 + 646 =
942
2
|
20.
569 – 339 =
2
230
|