Tientallen plus tientallen

Optellen

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

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

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

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

Tientallen plus tientallen
| ANTWOORDEN

Optellen

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

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

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

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