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4 August, 05:38

Tom is showing his work in simplifying (5.2 - 8.5) - 0.5 + 6.8. In which step did Tom make an error? Step 1:: (5.2 - 8.5) - 0.5 + 6.8 Step 2: 5.2 + (-8.5 - 0.5) + 6.8 (distributive property) Step 3: 5.2 - 9 + 6.8 Step 4: 5.2 + 6.8 - 9 (commutative property) Step 5: 12 - 9 = 3 Step 2; he wrote distributive instead of commutative Step 2; he wrote distributive instead of associative Step 4; he wrote commutative instead of associative Step 4; he wrote commutative instead of distributive

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  1. 4 August, 08:19
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    (5.2 - 8.5) - 0.5 + 6.8. In which step did

    Step 1:: (5.2 - 8.5) - 0.5 + 6.8

    Step 2: 5.2 + (-8.5 - 0.5) + 6.8 (distributive property)

    Wrong this is associative property, because he just ragrouped the terms.

    Step 3: 5.2 - 9 + 6.8

    Step 4: 5.2 + 6.8 - 9 (commutative property)

    Right because he just switched places

    Step 5: 12 - 9 = 3

    Answer: Step 2; he wrote distributive instead of associative
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