Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
788 + 192 =
2
980
|
2.
418 + 573 =
991
2
|
3.
180 – 83 =
2
97
|
4.
552 – 169 =
383
2
|
|
5.
555 – 257 =
298
2
|
6.
887 + 64 =
2
951
|
7.
844 – 428 =
2
416
|
8.
163 – 119 =
2
44
|
|
9.
446 + 247 =
2
693
|
10.
47 + 525 =
572
2
|
11.
77 – 62 =
15
1
|
12.
448 + 337 =
785
2
|
|
13.
520 – 89 =
431
2
|
14.
38 – 10 =
28
2
|
15.
245 + 497 =
2
742
|
16.
342 – 187 =
155
2
|
|
17.
19 – 11 =
1
8
|
18.
978 + 7 =
2
985
|
19.
21 – 9 =
12
1
|
20.
142 – 130 =
1
12
|