Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
879 – 588 =
291
2
|
2.
748 + 212 =
960
2
|
3.
44 – 20 =
2
24
|
4.
986 – 97 =
2
889
|
|
5.
985 + 1 =
2
986
|
6.
97 + 637 =
734
2
|
7.
215 – 102 =
2
113
|
8.
387 – 305 =
82
2
|
|
9.
363 + 420 =
783
2
|
10.
228 + 181 =
409
2
|
11.
799 + 163 =
962
2
|
12.
208 + 539 =
747
2
|
|
13.
36 – 3 =
33
2
|
14.
9 + 947 =
2
956
|
15.
384 – 133 =
251
2
|
16.
486 – 87 =
399
2
|
|
17.
835 + 24 =
859
2
|
18.
962 + 10 =
2
972
|
19.
802 – 591 =
2
211
|
20.
543 + 204 =
747
2
|