Question

Resolva aplicando a propriedade associativa.

a) 6+9+2=
b) 13+15+8=
c) 17-8+9=
d) 3+5+4=
e)10+3+8=
f)5+9+3=

Answer 1

a) 15+2=17
b) 28+8=36
c) 9+9=18
d) 8+4=12
e)13+8=21
f)14+3=17

Answer 2

a)
= 6 + 9 + 2
= 15 + 2
= 17
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b)
= 13 + 15 + 8 
= 28 + 8
= 36
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c)
= 17 - 8 + 9 
= 17 + 9 - 8
= 26 - 8
= 18 
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d)
= 3 + 5 + 4 
= 8 + 4
= 12
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e)
= 10 + 3 + 8 
= 13 + 8
= 21
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f)
= 5 + 9 + 3 
= 14 + 3
= 17
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