Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
436 + 522 =
958
2
|
2.
770 – 631 =
2
139
|
3.
88 – 88 =
2
0
|
4.
405 – 400 =
1
5
|
|
5.
642 – 13 =
2
629
|
6.
118 – 117 =
2
1
|
7.
144 + 376 =
520
2
|
8.
934 – 573 =
361
2
|
|
9.
78 + 320 =
398
2
|
10.
159 – 56 =
103
2
|
11.
596 – 367 =
229
2
|
12.
851 + 51 =
2
902
|
|
13.
276 + 404 =
680
2
|
14.
456 + 278 =
2
734
|
15.
17 – 14 =
1
3
|
16.
76 + 357 =
433
2
|
|
17.
975 – 118 =
2
857
|
18.
179 – 153 =
26
2
|
19.
652 + 332 =
2
984
|
20.
262 + 660 =
2
922
|