Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
814 + 9 =
823
2
|
2.
636 + 23 =
2
659
|
3.
378 – 335 =
43
2
|
4.
628 – 215 =
2
413
|
|
5.
412 – 303 =
109
2
|
6.
820 – 316 =
504
2
|
7.
871 – 398 =
2
473
|
8.
401 + 452 =
2
853
|
|
9.
94 – 80 =
14
1
|
10.
947 – 148 =
2
799
|
11.
435 – 19 =
416
2
|
12.
481 + 245 =
2
726
|
|
13.
302 – 161 =
2
141
|
14.
337 – 158 =
2
179
|
15.
392 + 93 =
485
2
|
16.
134 – 115 =
19
2
|
|
17.
962 + 1 =
963
2
|
18.
439 – 288 =
151
2
|
19.
191 – 121 =
2
70
|
20.
286 + 11 =
297
2
|