Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
551 + 32 =
583
2
|
2.
86 + 646 =
2
732
|
3.
235 – 41 =
2
194
|
4.
888 – 425 =
463
2
|
|
5.
627 + 67 =
2
694
|
6.
754 + 81 =
835
2
|
7.
504 – 31 =
473
2
|
8.
650 – 473 =
2
177
|
|
9.
59 – 28 =
2
31
|
10.
939 – 365 =
574
2
|
11.
553 – 522 =
31
2
|
12.
738 – 709 =
2
29
|
|
13.
47 – 2 =
2
45
|
14.
987 – 293 =
694
2
|
15.
43 – 20 =
23
2
|
16.
566 – 197 =
2
369
|
|
17.
521 + 256 =
2
777
|
18.
857 – 437 =
2
420
|
19.
993 – 804 =
2
189
|
20.
324 – 142 =
2
182
|