Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
205 – 25 =
180
2
|
2.
470 + 441 =
2
911
|
3.
300 + 472 =
772
2
|
4.
178 – 69 =
2
109
|
|
5.
718 + 34 =
752
2
|
6.
273 – 244 =
29
2
|
7.
876 + 21 =
2
897
|
8.
509 – 154 =
2
355
|
|
9.
308 – 287 =
2
21
|
10.
304 – 219 =
85
2
|
11.
992 – 857 =
135
2
|
12.
234 – 140 =
94
2
|
|
13.
702 + 167 =
869
2
|
14.
646 – 623 =
23
2
|
15.
927 – 525 =
402
2
|
16.
710 + 287 =
997
2
|
|
17.
590 + 76 =
666
2
|
18.
960 + 30 =
2
990
|
19.
348 – 325 =
2
23
|
20.
490 + 108 =
2
598
|