Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
79 – 69 =
10
1
|
2.
619 + 232 =
2
851
|
3.
244 – 34 =
210
2
|
4.
22 – 6 =
2
16
|
|
5.
743 – 167 =
2
576
|
6.
42 – 31 =
11
1
|
7.
687 + 198 =
885
2
|
8.
134 – 35 =
99
2
|
|
9.
489 + 166 =
655
2
|
10.
376 – 319 =
2
57
|
11.
75 – 8 =
67
2
|
12.
825 – 399 =
2
426
|
|
13.
28 + 849 =
877
2
|
14.
142 – 91 =
51
2
|
15.
751 + 172 =
923
2
|
16.
190 + 349 =
2
539
|
|
17.
439 + 101 =
540
2
|
18.
89 – 22 =
2
67
|
19.
738 + 99 =
837
2
|
20.
766 + 99 =
2
865
|