# Q. Write the expressions for each of the following using brackets. (a) Four multiplied by the sum of nine and two. (b) Divide the difference of eighteen and six by four. (c) Forty five divided by three times the sum of three and two.

(a) Four multiplied by the sum of nine and two.

$= 4\times(9+2) = 4\times11 = 44$
(b) Divide the difference of eighteen and six by four.

$= \frac{18-6}{4} = \frac{12}{4} = 3$
(c) Forty five divided by three times the sum of three and two.

$= \frac{45}{3(3+2)}$

$= \frac{45}{15} = 3$

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