Question statement
Which property does the equation represent?
$- 80 + 30 + (- 30) = - 80 + [30 + (- 30)]$

Commutative property of Addition

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Associative property of Addition

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Additive inverse property

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Addition property of zero

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Solution

The correct option is B
Associative property of Addition

Step 1: Commutative property: $a + b = b + a$ not applicable here
Associative property: $(a + b) + c = a + (b + c)$ applicable here
Here $a = - 80, b = 30, c = - 30$
Correct answer: Option B

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Marks	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$	$50 - 60$	$60 - 70$	$70 - 80$	$80 - 90$	$90 - 100$
No. of Students	$12$	$22$	$35$	$40$	$60$	$52$	$40$	$30$	$5$

Marks	$0 - 10$	$10 - 30$	$30 - 60$	$60 - 80$	$80 - 90$
No. of students	$5$	$15$	$30$	$8$	$2$

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