Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
830 + 86 =
916
2
|
2.
634 + 110 =
2
744
|
3.
76 + 908 =
2
984
|
4.
235 – 146 =
89
2
|
|
5.
408 – 372 =
2
36
|
6.
940 + 24 =
2
964
|
7.
662 – 366 =
296
2
|
8.
297 + 653 =
950
2
|
|
9.
400 + 159 =
2
559
|
10.
670 – 117 =
553
2
|
11.
825 – 395 =
430
2
|
12.
183 – 154 =
29
2
|
|
13.
612 + 147 =
759
2
|
14.
353 – 225 =
128
2
|
15.
135 + 14 =
2
149
|
16.
77 + 855 =
2
932
|
|
17.
643 + 75 =
2
718
|
18.
405 – 50 =
355
2
|
19.
738 + 198 =
936
2
|
20.
335 – 12 =
2
323
|