•describe the error.
show or explain how to do the problem the right way.
• give the correct answer.
40 + 70 + ? = 360
110 + ? = 360
-110 -110
? = 250 degrees
70

The error is in the step where you are deducting 110, from -110 whereas it will be deducted from (positive) 110.

Step-by-step explanation:

It will be like,

40+70+x(?)=360

or 110+x=360

or 110-110+x=360-110

or x=250

Thank you!

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

or