We have to compute ( ndash;23) + (+27). The magnitudes of ndash;23 is 23 and that of +27 is 27. Difference between them = 27 nbsp; ndash; 23 = 4 The ma ...

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Standard VI

Mathematics

Additive Identity and Additive Inverse

Add:12 -23,+2...

Question

Add:

(12) −23, +27

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Solution

We have to compute (–23) + (+27).
The magnitudes of –23 is 23 and that of +27 is 27.
Difference between them = 27 – 23 = 4
The magnitude of 27 is larger than 23. So, we will give 4 the sign of +27, i.e., the positive sign.
∴ (–23) + (+27) = +4

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Add: (12) −23, +27

We have to compute (–23) + (+27). The magnitudes of –23 is 23 and that of +27 is 27. Difference between them = 27 – 23 = 4 The magnitude of 27 is larger than 23. So, we will give 4 the sign of +27, i.e., the positive sign. ∴ (–23) + (+27) = +4

Add:

(12) −23, +27

We have to compute (–23) + (+27).
The magnitudes of –23 is 23 and that of +27 is 27.
Difference between them = 27 – 23 = 4
The magnitude of 27 is larger than 23. So, we will give 4 the sign of +27, i.e., the positive sign.
∴ (–23) + (+27) = +4