The second number line best shows how to solve –4 – (–8). This can be obtained by finding the value of –4 – (–8) and checking which number line has the required arrow mark.
The value of –4 – (–8) is obtained.
–4 – (–8) = –4 + 8
–4 – (–8) = 4
The arrow should move from zero to - 4 and the second arrow should move from - 4 to 4.
From the question given the number lines,
The first arrow is moving from zero to - 4.
First condition is satisfied.
The second arrow is moving from - 4 to 8.
Second condition is not satisfied.
The first arrow is moving from zero to - 4.
First condition is satisfied.
The second arrow is moving from - 4 to 4.
Second condition is satisfied.
Hence the second number line best shows how to solve –4 – (–8).
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