Mathematics
Grade-7
Easy
Question
The opposite number of 243 is ______
- 200
- 280
- -243
- -240
Hint:
Two numbers are said to be opposites of each other, if their sum add up to zero.
The correct answer is: -243
Let x be the opposite number of 243. Then, we have: 
. Solving the equation, we get:
Thus, the value is -243.
Hence, the correct answer is option c.
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