Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
93 + 578 =
671
2
|
2.
733 – 721 =
12
1
|
3.
60 + 110 =
170
2
|
4.
778 – 422 =
2
356
|
|
5.
957 – 47 =
910
2
|
6.
628 + 41 =
2
669
|
7.
608 + 20 =
2
628
|
8.
276 – 265 =
11
1
|
|
9.
575 + 103 =
2
678
|
10.
452 + 493 =
945
2
|
11.
259 – 190 =
2
69
|
12.
961 – 603 =
358
2
|
|
13.
331 – 231 =
100
2
|
14.
224 + 373 =
597
2
|
15.
3 + 490 =
2
493
|
16.
133 – 124 =
9
1
|
|
17.
341 + 75 =
2
416
|
18.
222 – 62 =
160
2
|
19.
148 – 46 =
102
2
|
20.
158 + 168 =
326
2
|