Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
651 – 630 =
2
21
|
2.
437 + 387 =
824
2
|
3.
390 – 245 =
2
145
|
4.
901 + 73 =
974
2
|
|
5.
123 – 108 =
1
15
|
6.
114 + 72 =
186
2
|
7.
646 – 221 =
425
2
|
8.
49 – 34 =
15
1
|
|
9.
84 + 589 =
673
2
|
10.
158 + 2 =
2
160
|
11.
248 – 61 =
2
187
|
12.
154 – 152 =
2
1
|
|
13.
705 + 85 =
2
790
|
14.
457 + 274 =
731
2
|
15.
676 + 38 =
714
2
|
16.
337 + 38 =
2
375
|
|
17.
577 – 571 =
1
6
|
18.
895 + 28 =
2
923
|
19.
907 + 76 =
983
2
|
20.
107 – 21 =
86
2
|