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+1 vote
8.8k views
in Mathematics by (35.7k points)

Using the number line, subtract : 

(a) 2 from –3 (b) –2 from –3.

1 Answer

+1 vote
by (62.0k points)
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Best answer

(a) To subtract 2 from –3, we move 2 steps to the left of – 3 on the number line and reach –5. (Fig. 3.3)

So, –3 – 2 = –5.

(b) To subtract –2 from –3, we observe that 2 is the additive inverse of –2. 

So, we add 2 to –3 using the number line and reach at –1. 

So, –3 – (–2) = –3 + (+ 2) = –1

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