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Mathematics, 21.11.2020 04:20 brendaesme
WILL GIVE BRAINLIEST - 6TH GRADE MATHEMATICS
Angie is showing her work in simplifying −7.9 + 8.2 − 3.4 + 2.1. Identify any errors in her work or in her reasoning.
StepWorkReasoning
−7.9 + 8.2 − 3.4 + 2.1Original problem
1−7.9 + 8.2 + (−3.4) + 2.1Additive inverse
2−7.9 + (−3.4) + 8.2 + 2.1Commutative property
3[−7.9 + (−3.4)] + (8.2 + 2.1)Associative property
4−11.3 + 10.3Simplify
5−1Simplify
She did not make any errors.
Step 1: She wrote −3.4 incorrectly as + (−3.4).
Step 2: She identified changing the order of the numbers as the commutative property, which is incorrect.
Step 3: She identified changing the grouping of the numbers as the associative property, which is incorrect.
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WILL GIVE BRAINLIEST - 6TH GRADE MATHEMATICS
Angie is showing her work in simplifying −7.9 + 8.2 −...
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