Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
335 + 457 =
792
2
|
2.
273 – 64 =
2
209
|
3.
868 – 606 =
2
262
|
4.
593 + 392 =
2
985
|
|
5.
60 – 57 =
1
3
|
6.
697 + 158 =
855
2
|
7.
167 + 523 =
690
2
|
8.
428 + 427 =
855
2
|
|
9.
944 – 574 =
2
370
|
10.
922 – 855 =
2
67
|
11.
967 + 17 =
984
2
|
12.
741 + 170 =
911
2
|
|
13.
949 – 330 =
2
619
|
14.
118 + 397 =
2
515
|
15.
245 + 692 =
937
2
|
16.
829 + 109 =
2
938
|
|
17.
105 + 69 =
174
2
|
18.
437 – 198 =
239
2
|
19.
911 + 78 =
989
2
|
20.
106 – 49 =
57
2
|