Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
641 + 289 =
930
2
|
2.
651 + 66 =
2
717
|
3.
34 + 542 =
2
576
|
4.
886 + 37 =
2
923
|
|
5.
391 + 144 =
2
535
|
6.
924 + 10 =
934
2
|
7.
534 + 223 =
757
2
|
8.
415 – 244 =
2
171
|
|
9.
1 – 0 =
2
1
|
10.
399 + 330 =
2
729
|
11.
776 + 198 =
974
2
|
12.
960 + 39 =
999
2
|
|
13.
478 – 42 =
436
2
|
14.
681 + 144 =
2
825
|
15.
482 – 429 =
53
2
|
16.
423 + 565 =
2
988
|
|
17.
157 + 768 =
2
925
|
18.
378 – 80 =
2
298
|
19.
61 + 562 =
623
2
|
20.
149 – 20 =
2
129
|