Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
814 – 414 =
2
400
|
2.
605 + 72 =
2
677
|
3.
993 – 447 =
546
2
|
4.
27 + 821 =
848
2
|
|
5.
84 – 58 =
2
26
|
6.
533 – 409 =
2
124
|
7.
869 – 184 =
2
685
|
8.
90 – 36 =
54
2
|
|
9.
198 – 84 =
2
114
|
10.
534 + 407 =
941
2
|
11.
877 + 23 =
2
900
|
12.
38 + 962 =
1000
2
|
|
13.
780 – 770 =
1
10
|
14.
463 + 171 =
634
2
|
15.
221 + 334 =
555
2
|
16.
633 + 35 =
668
2
|
|
17.
296 + 570 =
866
2
|
18.
101 + 445 =
2
546
|
19.
808 + 157 =
965
2
|
20.
931 + 48 =
2
979
|