En resumen

10 + 20 = 30 54 + 6 = 60 5 + 8 = 13 12 + 8 = 20 5 + 5 = 10 100 + 52 = 152 30 + 90 = 120 2 + 2 = 4 200 + 500 = 700.

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3

10 + 20 = 30

54 + 6 = 60

5 + 8 = 13

12 + 8 = 20

5 + 5 = 10

100 + 52 = 152

30 + 90 = 120

2 + 2 = 4

200 + 500 = 700.