Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
592 – 213 =
2
379
|
2.
280 – 162 =
2
118
|
3.
512 + 82 =
2
594
|
4.
653 + 291 =
2
944
|
|
5.
130 – 126 =
1
4
|
6.
600 + 135 =
735
2
|
7.
48 – 47 =
1
2
|
8.
523 + 288 =
811
2
|
|
9.
878 + 23 =
901
2
|
10.
241 + 684 =
2
925
|
11.
52 + 224 =
2
276
|
12.
82 + 13 =
2
95
|
|
13.
46 – 18 =
28
2
|
14.
798 – 785 =
1
13
|
15.
188 + 265 =
453
2
|
16.
803 + 79 =
2
882
|
|
17.
481 – 253 =
228
2
|
18.
877 + 113 =
990
2
|
19.
893 + 94 =
987
2
|
20.
779 + 59 =
838
2
|