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avatar+1014 

Andrew is showing his work in simplifying −4.5 + 4.2 + 5.6 − 7.3. Identify any errors in his work or in his reasoning. Write feedback to Andrew explaining the mistake he made and how to correct his work.
 

StepWorkReasoning

(−4.5 + 4.2 + 5.6 − 7.3  Original problem)

(1−4.5 + 4.2 + 5.6 + (−7.3)  Additive inverse)

(2−4.5 + (−7.3) + 4.2 + 5.6  Commutative property)

(3(−4.5 + (−7.3)) + (4.2 + 5.6)  Associative property)

(4−11.8 + 9.8  Simplify)

(5−21.6  Simplify)

 

 

Thanks For the Help In advance 

 Jul 15, 2019
 #1
avatar+791 
+6

StepWorkReasoning

(−4.5 + 4.2 + 5.6 − 7.3  Original problem)

(1−4.5 + 4.2 + 5.6 + (−7.3)  Additive inverse)

(2−4.5 + (−7.3) + 4.2 + 5.6  Commutative property)

(3(−4.5 + (−7.3)) + (4.2 + 5.6)  Associative property)

(4−11.8 + 9.8  Simplify)

(5−21.6  Simplify)

heres what i done

−4.5 + 4.2 + 5.6 − 7.3 

−4.5 + 4.2 + 5.6 + (−7.3)

−4.5 + (−7.3) + 4.2 + 5.6 

(−4.5 + (−7.3)) + (4.2 + 5.6) 

-11.8+9.8 = -2

 

The red is incorrect up top and corrected below

 

 

Travisio

 Jul 15, 2019
 #2
avatar+1014 
+3

Thanks so instead of Having the two you put in red that you said were wrong have the one you said was correct instead of the two were wrong 

 

so basically what I am saying is put the red one that you said was the correct answer in the spot were you said the two in red were the problem.

Nickolas  Jul 15, 2019
 #3
avatar+103999 
+3

The mistake is from step 4 to step 5

 

Note

 

-11.8 + 9.8  =

 

-2

 

 

cool cool cool

 Jul 15, 2019
 #4
avatar+1014 
+3

Thanks Cphill and Travisio I am just looking over just to make sure I am following what you’re saying 

Nickolas  Jul 15, 2019
 #5
avatar+1014 
+3

Okay I get it thanks guys have a awesome day!

😀😀

Nickolas  Jul 15, 2019

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