Addition de dizaines - 1ère partie

Complète chaque addition.
10 + 10 + 10 =
10 + 10 + 10 + 10 + 10 =
10 + 10 =
10 + 10 + 10 + 10 + 10 + 10 + 10 =
10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 =
10 + 10 + 10 + 10 =
10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 =
10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 =
10 + 10 + 10 + 10 + 10 =
10 + 10 + 10 + 10 + 10 + 10 =