Question

| 9 | + |-9| =?
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Answer 1

Answer:

[9]+[-9]

= 9+9

= 18

Step-by-step explanation:

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Answer 2

Answer:

18

Step-by-step explanation:

Mod is an operation in mathematics which gives positive value of the number enclosed within it.

I x I = x

I- x I = x

So,

I 9I = 9

I-9I = 9

Now,

I9I + I-9I = 9 + 9

I9I + I-9I = 18

Hence the answer is 18.

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