Ruthzenaidaruid Ruthzenaidaruid Matemáticas contestada 400 +67 = 67 + 400 567 + 0 = 567 34 +67= 67 +34 (3+5) + 7 = 3 + (5+7) 0 +500 = 500 (34+56) + 78 = 34+ (56+78)
