Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
789 – 728 =
61
2
|
2.
368 + 182 =
2
550
|
3.
73 – 55 =
18
2
|
4.
104 – 13 =
91
2
|
|
5.
609 – 595 =
14
1
|
6.
729 + 144 =
873
2
|
7.
232 – 48 =
184
2
|
8.
823 – 192 =
631
2
|
|
9.
581 – 572 =
9
1
|
10.
787 – 525 =
262
2
|
11.
770 + 187 =
2
957
|
12.
600 + 235 =
835
2
|
|
13.
797 + 191 =
2
988
|
14.
656 + 282 =
938
2
|
15.
398 – 280 =
118
2
|
16.
639 + 156 =
2
795
|
|
17.
446 – 320 =
126
2
|
18.
127 + 402 =
2
529
|
19.
874 + 69 =
943
2
|
20.
953 + 4 =
957
2
|