Question 53

Simplify:
7.8 - 0.4 of (5.1 - 3.8) + 9.3 x 1.5

Solution

$$7.8 - 0.4 of (5.1 - 3.8) + 9.3 \times 1.5$$

Using BODMAS,

$$=7.8 - 0.4 of (5.1 - 3.8) + 13.95$$

$$=7.8 - 0.4 of 1.3 + 13.95$$

$$=7.8 - 0.4 \times 1.3 + 13.95$$

$$=7.8 - 0.52 + 13.95$$

=21.75 - 0.52

$$=21.23$$

Option C is correct.

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Simplify:7.8 - 0.4 of (5.1 - 3.8) + 9.3 x 1.5