Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
177 – 10 =
2
167
|
2.
851 + 21 =
2
872
|
3.
940 + 56 =
2
996
|
4.
177 + 241 =
418
2
|
|
5.
910 + 72 =
982
2
|
6.
816 + 127 =
2
943
|
7.
417 – 211 =
2
206
|
8.
416 + 235 =
2
651
|
|
9.
820 + 38 =
2
858
|
10.
229 – 150 =
79
2
|
11.
156 – 54 =
2
102
|
12.
647 + 181 =
2
828
|
|
13.
258 – 255 =
3
1
|
14.
389 + 148 =
537
2
|
15.
102 – 28 =
74
2
|
16.
561 – 7 =
2
554
|
|
17.
583 + 40 =
623
2
|
18.
888 – 338 =
2
550
|
19.
333 + 296 =
2
629
|
20.
512 – 435 =
77
2
|