Optellen tot 100 zonder brug (TE + T=TE) oefening 2

44 + 20 = 28 + 70 =
34 + 50 = 57 + 40 =
43 + 40 = 36 + 40 =
25 + 30 = 42 + 30 =
51 + 10 = 32 + 20 =