Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
352 – 121 =
2
231
|
2.
386 + 489 =
2
875
|
3.
347 – 193 =
2
154
|
4.
639 + 42 =
2
681
|
|
5.
794 + 21 =
2
815
|
6.
95 + 259 =
2
354
|
7.
562 – 290 =
272
2
|
8.
632 + 353 =
985
2
|
|
9.
449 + 190 =
2
639
|
10.
765 – 366 =
399
2
|
11.
329 + 558 =
2
887
|
12.
340 + 68 =
408
2
|
|
13.
829 + 44 =
2
873
|
14.
106 – 70 =
2
36
|
15.
103 – 91 =
12
1
|
16.
240 – 211 =
29
2
|
|
17.
306 + 522 =
828
2
|
18.
956 + 28 =
984
2
|
19.
56 – 43 =
13
1
|
20.
932 – 317 =
615
2
|