Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
164 – 91 =
73
2
|
2.
407 – 148 =
259
2
|
3.
1000 – 757 =
2
243
|
4.
845 – 548 =
297
2
|
|
5.
106 – 45 =
61
2
|
6.
508 + 319 =
2
827
|
7.
702 – 468 =
2
234
|
8.
645 + 245 =
2
890
|
|
9.
790 + 150 =
2
940
|
10.
68 + 775 =
843
2
|
11.
279 – 195 =
2
84
|
12.
75 – 61 =
1
14
|
|
13.
444 + 28 =
2
472
|
14.
992 + 4 =
996
2
|
15.
257 + 39 =
2
296
|
16.
3 – 1 =
2
1
|
|
17.
904 – 308 =
2
596
|
18.
950 + 44 =
994
2
|
19.
622 + 113 =
2
735
|
20.
783 + 194 =
977
2
|