Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
791 – 776 =
1
15
|
2.
981 + 13 =
994
2
|
3.
102 + 77 =
179
2
|
4.
261 + 383 =
2
644
|
|
5.
284 – 246 =
2
38
|
6.
713 + 24 =
737
2
|
7.
415 – 407 =
8
1
|
8.
629 + 370 =
2
999
|
|
9.
217 + 271 =
2
488
|
10.
349 + 358 =
2
707
|
11.
119 – 64 =
55
2
|
12.
361 – 111 =
2
250
|
|
13.
21 – 6 =
15
1
|
14.
369 – 85 =
2
284
|
15.
494 + 331 =
825
2
|
16.
946 + 13 =
2
959
|
|
17.
518 – 355 =
163
2
|
18.
93 – 27 =
2
66
|
19.
493 – 303 =
190
2
|
20.
641 – 2 =
2
639
|