3. Indica las propiedades que se han aplicado
a) 4+0=4____________________________
b) 9+2=2+9__________________________
c) (4+7)+3=4+(7+3)___________________
d) 9+4=13 € N________________________
e) Si x+8=10+8, x=10__________________
f) Si n=3,n+7=10___________________
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Answer:
a) identity
b) commutativity
c) associativity
d) addition
e) cancellation law
f) substitition
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