Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
99 + 642 =
2
741
|
2.
65 – 30 =
2
35
|
3.
757 + 29 =
786
2
|
4.
247 + 127 =
374
2
|
|
5.
271 – 94 =
2
177
|
6.
690 + 205 =
895
2
|
7.
567 + 231 =
798
2
|
8.
272 – 156 =
2
116
|
|
9.
917 – 515 =
402
2
|
10.
945 + 41 =
986
2
|
11.
559 – 525 =
2
34
|
12.
595 + 390 =
985
2
|
|
13.
381 – 119 =
2
262
|
14.
686 + 72 =
758
2
|
15.
429 – 318 =
2
111
|
16.
357 + 562 =
2
919
|
|
17.
326 – 201 =
2
125
|
18.
317 + 430 =
2
747
|
19.
619 – 44 =
575
2
|
20.
340 – 257 =
83
2
|