Calculate the value of $| - 3.1 | - | - 4.2 | + | 2.3 |$ .

1.2

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3.4

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6.9

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7.6

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9.6

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Solution

The correct option is A $1.2$
Value of $| a | = + a$ when $a$ is positive integer
and $| a | = - a$ when $a$ is negative integer.
So $| - 3.1 | - | - 4.2 | + | 2.3 |$
$\Rightarrow - (- 3.1) - (- (- 4.2)) + (2.3) \Rightarrow 3.1 - 4.2 + 2.3 \Rightarrow 1.2$

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