# How do I write the opposite of a rational number? [closed]

Write the opposite of each rational number

A)$9$

B)$-17.6$

C) $6.12$

D) $-7 \frac{5}{7 }$

Some one please help! I am not doing very good in Math I'm in grade 9 and I'm struggling I would highly appreciate if someone would help me out. Thanks for taking your time to read this:)

## closed as off-topic by Cameron Williams, Najib Idrissi, Mankind, Empty, Claude LeiboviciSep 30 '15 at 8:18

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• The opposite of a number means change its sign. So a positive becomes negative and vice versa – imranfat Sep 30 '15 at 3:09
• So like 9 would be -9 now? – Sally Sep 30 '15 at 3:10
• Yes, the opposite of 9 is -9 – imranfat Sep 30 '15 at 3:10
• Thanks so much I really appreciate your help!!:) – Sally Sep 30 '15 at 3:11
• You have butchered your own post. Your initial question was fine (though your title needed work), but butchering posts is highly discouraged by this community. It makes us unwilling to help. – Cameron Williams Sep 30 '15 at 3:11

## 1 Answer

Just change the sign. Remember, if there is no sign shown, it's positive. (I like to say there is an invisible $+$ sign.)

So, if the value is +'ve, it becomes -'ve; and -'ve becomes +'ve.

Note that finding the opposite is the same as multiplying by $-1$.