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Sagot :
The correct option is (d)
He wrote commutative instead of associative in step 2.
What is the commutative property?
According to the commutative property, a mathematical principle, the product of a multiplication does not depend on the order in which the numbers are multiplied.
Commutative property: a+b = b+a
Associative property: (a+b) + = a+(b+c)
Now consider the provided expression.
(6.2 − 1.6) − 4.4 + 7.8
Step 1:
(6.2 − 1.6) − 4.4 + 7.8
Step 2 Use Associative property
6.2 + (−1.6 − 4.4) + 7.8
Step 3: Simplify
6.2 − 6 + 7.8
Step 4: Use commutative property
14 − 6
Step 5: Simplify
14 − 6 = 8
Hence, the wrong step is step 2.
He wrote commutative instead of associative in Step 2.
To know more about the commutative property visit:
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I understand that the question you are looking for is:
Matt is showing his work in simplifying (6.2 − 1.6) − 4.4 + 7.8. Identify any error in his work or reasoning. Step 1: (6.2 − 1.6) − 4.4 + 7.8 Step 2: 6.2 + (− 1.6 − 4.4) + 7.8 (commutative property) Step 3: 6.2 − 6 + 7.8 Step 4: −14 − 6 = 8 (commutative property) Step 5: 14 − 6 = 8
(a)-He wrote commutative instead of distributive in Step 4.
(b)-He wrote commutative instead of distributive in Step 2.
(c)-He wrote commutative instead of associative in Step 4.
(d)-He wrote commutative instead of associative in Step 2.
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