Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
118 + 421 =
2
539
|
2.
66 – 66 =
2
0
|
3.
676 – 306 =
2
370
|
4.
436 – 351 =
85
2
|
|
5.
191 – 80 =
111
2
|
6.
367 + 225 =
2
592
|
7.
108 – 82 =
2
26
|
8.
994 + 1 =
995
2
|
|
9.
829 – 658 =
171
2
|
10.
50 + 583 =
633
2
|
11.
67 + 666 =
733
2
|
12.
242 – 225 =
2
17
|
|
13.
572 + 227 =
2
799
|
14.
824 + 128 =
952
2
|
15.
90 – 67 =
23
2
|
16.
328 – 273 =
2
55
|
|
17.
524 + 145 =
2
669
|
18.
100 – 85 =
15
1
|
19.
698 – 473 =
225
2
|
20.
910 + 10 =
920
2
|