Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
935 – 587 =
348
2
|
2.
239 – 143 =
96
2
|
3.
211 + 305 =
516
2
|
4.
408 – 183 =
225
2
|
|
5.
66 – 6 =
60
2
|
6.
134 + 827 =
961
2
|
7.
249 + 179 =
428
2
|
8.
241 – 86 =
155
2
|
|
9.
13 + 467 =
2
480
|
10.
211 – 22 =
189
2
|
11.
291 + 251 =
542
2
|
12.
314 – 193 =
2
121
|
|
13.
448 – 289 =
2
159
|
14.
506 – 270 =
2
236
|
15.
878 – 313 =
565
2
|
16.
701 + 131 =
832
2
|
|
17.
104 – 15 =
89
2
|
18.
58 + 530 =
2
588
|
19.
892 + 33 =
2
925
|
20.
332 + 528 =
860
2
|