Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
558 – 237 =
321
2
|
2.
55 – 20 =
35
2
|
3.
689 – 435 =
254
2
|
4.
198 + 662 =
2
860
|
|
5.
784 – 207 =
577
2
|
6.
378 + 533 =
2
911
|
7.
740 + 6 =
2
746
|
8.
458 + 444 =
902
2
|
|
9.
327 – 326 =
2
1
|
10.
673 – 82 =
2
591
|
11.
682 + 126 =
2
808
|
12.
94 – 14 =
2
80
|
|
13.
246 – 108 =
138
2
|
14.
227 – 118 =
2
109
|
15.
356 – 213 =
143
2
|
16.
848 – 847 =
2
1
|
|
17.
202 – 24 =
178
2
|
18.
977 + 9 =
2
986
|
19.
214 – 31 =
183
2
|
20.
12 – 10 =
1
2
|