Question

@ChrystalC

Answer 1

Arlene is showing her work in simplifying −7.9 + 8.2 − 3.4 + 2.1. Identify any errors in her work or in her reasoning. Write feedback to Arlene explaining the mistake she made and how to correct her work.


Step Work Reasoning
−7.9 + 8.2 − 3.4 + 2.1 Original problem
1 −7.9 + 8.2 + (−3.4) + 2.1 Additive inverse
2 −7.9 + (−3.4) + 8.2 + 2.1 Associative property
3 (−7.9 + (−3.4)) + (8.2 + 2.1) Commutative property
4 −11.3 + 10.3 Simplify
5 −1 Simplify

Answer 2

my teacher said the properties in steps 2 & 3 are misidentified but i do not see any errors

Answer 3

i tried each step but i don't see any errors

Answer 4

tag people cause my teacher asked me to redo this because there are errors in step 2 and 3

Answer 5

it is the way they are indtified

Answer 6

Ok

Answer 7

2 −7.9 + (−3.4) + 8.2 + 2.1 Associative property
3 (−7.9 + (−3.4)) + (8.2 + 2.1) Commutative property

Answer 8

associative and commutative is the part that is wrong

Answer 9

@ali2x2

Answer 10

@Mehek14

Answer 11

@Daniel14

Answer 12

@misty_fox

Answer 13

@mathmath333

Answer 14

@undeadknight26

Answer 15

@Cookie_2046

Answer 16

anyone?!?!?

Answer 17

i think the second should be commutative and third should be associtive , not sure

Answer 18

yeah that sounds right THXS SO MUCH