Optellen tot 100 zonder brug (T + E) oefening 1

Vul in!
20 + 4 = 30 + 6 =
50 + 7 = 60 + 2 =
80 + 5 = 70 + 9 =
40 + 3 = 90 + 1 =
80 + 3 = 60 + 4 =