Question 52

The value of $$\left[0.9 - \left\{2.3 - 3.2 - (7.1 - 5.4 - 3.5)\right\}\right]$$ is:

Solution

$$\left[0.9-\left\{2.3-3.2-\left(7.1-5.4-3.5\right)\right\}\right]$$

$$=\left[0.9-\left\{2.3-3.2-\left(7.1-8.9\right)\right\}\right]$$

$$=\left[0.9-\left\{2.3-3.2-\left(-1.8\right)\right\}\right]$$

$$=\left[0.9-\left\{2.3-3.2+1.8\right\}\right]$$

$$=\left[0.9-\left\{4.1-3.2\right\}\right]$$

$$=\left[0.9-0.9\right]$$

$$=0$$

Hence, the correct answer is Option A

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