Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
774 – 285 =
489
2
|
2.
634 – 179 =
455
2
|
3.
454 + 42 =
496
2
|
4.
936 – 886 =
2
50
|
|
5.
945 – 397 =
548
2
|
6.
896 – 414 =
482
2
|
7.
755 – 148 =
2
607
|
8.
537 – 235 =
302
2
|
|
9.
406 – 86 =
320
2
|
10.
566 + 373 =
2
939
|
11.
197 + 212 =
2
409
|
12.
376 – 52 =
324
2
|
|
13.
6 + 891 =
2
897
|
14.
556 + 237 =
793
2
|
15.
128 – 75 =
2
53
|
16.
651 – 405 =
246
2
|
|
17.
791 – 746 =
2
45
|
18.
323 – 192 =
2
131
|
19.
1 + 417 =
2
418
|
20.
291 + 587 =
878
2
|