Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
450 – 113 =
337
2
|
2.
637 – 612 =
2
25
|
3.
851 – 544 =
307
2
|
4.
31 + 326 =
357
2
|
|
5.
667 + 165 =
832
2
|
6.
347 – 105 =
242
2
|
7.
521 – 415 =
2
106
|
8.
243 – 88 =
155
2
|
|
9.
481 + 67 =
548
2
|
10.
22 – 6 =
2
16
|
11.
108 – 17 =
2
91
|
12.
367 + 543 =
910
2
|
|
13.
563 – 131 =
432
2
|
14.
326 – 142 =
184
2
|
15.
286 – 62 =
2
224
|
16.
442 + 105 =
2
547
|
|
17.
316 + 154 =
2
470
|
18.
49 – 41 =
1
8
|
19.
157 – 3 =
154
2
|
20.
15 – 9 =
1
6
|