Tientallen plus tientallen

Optellen

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

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

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

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

Tientallen plus tientallen
| ANTWOORDEN

Optellen

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

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

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

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