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Properties of Multiplication of Integers

Simplify: 7 +...

Question

Simplify: $7 + 7 \div 7 + 7 \times 7 - 7$

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Solution

Using $B O D M A S$

$7 + 7 \div 7 + 7 \times 7 - 7$

$= 7 + 1 + 7 \times 7 - 7$

$= 7 + 1 + 49 - 7$

$= 57 - 7$

$= 50$

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\frac{2}{\sqrt{7} + \sqrt{5}} + \frac{7}{\sqrt{12} - \sqrt{5}} - \frac{7}{\sqrt{12} - \sqrt{7}}

{(\frac{4}{7})}^{- 5} \times {(\frac{7}{4})}^{- 7}

Q. Simplify the following expression:

cos 0 + cos \frac{π}{2} + cos \frac{2 π}{7} + cos \frac{3 π}{7} + cos \frac{4 π}{7} + cos \frac{5 π}{7} + cos \frac{6 π}{7}

Q. Simplify:

(7) (–7) × (–11)

1 \div 7 \div 7

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