4\div 1/5

Solution

4 \div \frac{1}{5}

20

Solution steps

4 \div \frac{1}{5}

Convert element to fraction:

4 = \frac{4}{1}

= \frac{4}{1} \div \frac{1}{5}

Apply the fraction rule:

\frac{a}{b} \div \frac{c}{d} = \frac{a}{b} \times \frac{d}{c}

= \frac{4}{1} \times \frac{5}{1}

Apply rule

\frac{a}{1} = a

= 4 \times 5

Multiply the numbers:

4 \times 5 = 20

= 20

7 x^{2} (x^{4} - 3 x^{3} - x^{2} + 2 x - 5)

(2 x^{3} + 5 x - 3) - (2 x^{3} - 3 x^{2} + 4 x)

(x + 6) (x + 8)

(3 x + 1) (x^{2} + 2 x - 10)

\frac{4 mn - 8 m ^{2} n - 2 mn}{2 mn}