Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
59 – 58 =
2
1
|
2.
752 – 442 =
2
310
|
3.
704 + 57 =
2
761
|
4.
289 + 329 =
618
2
|
|
5.
980 + 13 =
2
993
|
6.
996 + 1 =
997
2
|
7.
165 – 114 =
51
2
|
8.
402 + 483 =
2
885
|
|
9.
929 + 27 =
2
956
|
10.
659 + 119 =
778
2
|
11.
441 + 454 =
895
2
|
12.
164 + 386 =
550
2
|
|
13.
234 – 166 =
68
2
|
14.
97 – 38 =
2
59
|
15.
874 – 786 =
2
88
|
16.
933 – 366 =
2
567
|
|
17.
263 – 220 =
2
43
|
18.
456 + 335 =
791
2
|
19.
695 + 292 =
2
987
|
20.
670 + 142 =
812
2
|