Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
979 + 19 =
2
998
|
2.
145 + 488 =
633
2
|
3.
129 + 397 =
526
2
|
4.
95 – 44 =
51
2
|
|
5.
943 – 80 =
2
863
|
6.
621 + 37 =
2
658
|
7.
459 – 384 =
2
75
|
8.
457 – 86 =
371
2
|
|
9.
670 + 111 =
2
781
|
10.
613 + 122 =
735
2
|
11.
808 – 681 =
127
2
|
12.
778 – 652 =
126
2
|
|
13.
148 + 485 =
633
2
|
14.
258 – 176 =
82
2
|
15.
953 + 43 =
996
2
|
16.
342 + 507 =
2
849
|
|
17.
976 + 16 =
2
992
|
18.
57 – 34 =
2
23
|
19.
241 + 46 =
287
2
|
20.
264 – 17 =
2
247
|