Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
892 + 89 =
2
981
|
2.
318 – 91 =
2
227
|
3.
919 + 40 =
959
2
|
4.
988 + 1 =
2
989
|
|
5.
435 + 133 =
2
568
|
6.
782 – 693 =
89
2
|
7.
359 + 270 =
2
629
|
8.
984 – 87 =
2
897
|
|
9.
915 – 843 =
72
2
|
10.
86 – 78 =
8
1
|
11.
566 – 148 =
2
418
|
12.
804 – 124 =
2
680
|
|
13.
289 + 182 =
471
2
|
14.
277 + 251 =
2
528
|
15.
738 – 642 =
2
96
|
16.
850 – 745 =
105
2
|
|
17.
899 – 613 =
2
286
|
18.
594 + 354 =
948
2
|
19.
224 – 207 =
2
17
|
20.
822 – 607 =
215
2
|