Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
877 + 109 =
2
986
|
2.
140 + 205 =
2
345
|
3.
40 – 20 =
20
2
|
4.
354 + 179 =
533
2
|
|
5.
131 – 94 =
2
37
|
6.
175 + 139 =
314
2
|
7.
985 + 7 =
2
992
|
8.
417 – 401 =
2
16
|
|
9.
341 – 273 =
68
2
|
10.
144 – 36 =
108
2
|
11.
708 – 685 =
2
23
|
12.
832 – 554 =
278
2
|
|
13.
699 – 504 =
2
195
|
14.
891 – 361 =
530
2
|
15.
670 + 75 =
2
745
|
16.
279 – 279 =
2
0
|
|
17.
469 + 478 =
947
2
|
18.
891 – 164 =
2
727
|
19.
407 + 576 =
983
2
|
20.
613 – 489 =
2
124
|