Question

Allen is showing his work in simplifying –8.3 + 9.2 – 4.4 + 3.7. Identify and explain any errors in his work or in his reasoning. Write feedback to Allen explaining the mistake he made and how to correct his work.
StepWorkReason
−8.3 + 9.2 − 4.4 + 3.7 Original problem
1−8.3 + 9.2 + 4.4 + 3.7 Additive inverse
2−8.3 + 4.4 + 9.2 + 3.7 Commutative property
3−8.3 + (4.4 + 9.2 + 3.7)Associative property
4−8.3 + 17.3 Simplify
5 9 Simplify

Answer 1

Answer:

Option (1)

Step-by-step explanation:

-8.3+9.2-4.4+3.7 john has used his first step as -8.3+9.2+4.4+3.7.

He has use additive inverse as their is no information is given about the additive inverse -4.4 can not be converted +4.4 .this is his incorrect step.

So, the correct steps are

-8.3+9.2-4.4+3.7

= (-8.3-4.4)+(9.2+3.7)

= -12.7+12.9

= 0.2

Hence, there is need to change the step  !.

Hence, the correct answer is 1.

Answer 2

Additive inverse; you can't just take -4.4 and make it positive.