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(3+7)+10+(2+8)= 30
3+(7+10+2)+8= 30
( 3+7 )+ 10+ (2+8) = 3 + (7+10)+(2+8) = resolvemos
10 + 10 + 10 = 3 + 17 + 10
30 = 30 funciona propiedad asociativa yconmutativa al mismo tiempo