Tientallen plus tientallen

Optellen

Oefening 1
1.	10 + 80 =
2.	20 + 20 =
3.	60 + 20 =
4.	10 + 10 =
5.	70 + 20 =
6.	70 + 10 =
7.	70 + 20 =
8.	60 + 30 =
9.	30 + 10 =
10.	20 + 70 =

Oefening 2
1.	40 + 10 =
2.	40 + 30 =
3.	80 + 10 =
4.	50 + 20 =
5.	60 + 20 =
6.	80 + 10 =
7.	40 + 10 =
8.	80 + 10 =
9.	80 + 10 =
10.	80 + 10 =

Oefening 3
1.	70 + 20 =
2.	50 + 20 =
3.	60 + 30 =
4.	70 + 20 =
5.	80 + 10 =
6.	30 + 40 =
7.	60 + 20 =
8.	50 + 40 =
9.	40 + 10 =
10.	20 + 70 =

Oefening 4
1.	50 + 40 =
2.	80 + 10 =
3.	60 + 30 =
4.	80 + 10 =
5.	40 + 30 =
6.	70 + 10 =
7.	80 + 10 =
8.	40 + 50 =
9.	60 + 10 =
10.	20 + 40 =

Tientallen plus tientallen
| ANTWOORDEN

Optellen

Oefening 1
1.	10 + 80 =	90
2.	20 + 20 =	40
3.	60 + 20 =	80
4.	10 + 10 =	20
5.	70 + 20 =	90
6.	70 + 10 =	80
7.	70 + 20 =	90
8.	60 + 30 =	90
9.	30 + 10 =	40
10.	20 + 70 =	90

Oefening 2
1.	40 + 10 =	50
2.	40 + 30 =	70
3.	80 + 10 =	90
4.	50 + 20 =	70
5.	60 + 20 =	80
6.	80 + 10 =	90
7.	40 + 10 =	50
8.	80 + 10 =	90
9.	80 + 10 =	90
10.	80 + 10 =	90

Oefening 3
1.	70 + 20 =	90
2.	50 + 20 =	70
3.	60 + 30 =	90
4.	70 + 20 =	90
5.	80 + 10 =	90
6.	30 + 40 =	70
7.	60 + 20 =	80
8.	50 + 40 =	90
9.	40 + 10 =	50
10.	20 + 70 =	90

Oefening 4
1.	50 + 40 =	90
2.	80 + 10 =	90
3.	60 + 30 =	90
4.	80 + 10 =	90
5.	40 + 30 =	70
6.	70 + 10 =	80
7.	80 + 10 =	90
8.	40 + 50 =	90
9.	60 + 10 =	70
10.	20 + 40 =	60