Tientallen plus tientallen

Optellen

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

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

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

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

Tientallen plus tientallen
| ANTWOORDEN

Optellen

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

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

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

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