Question

48: 0,16
1 3/26 - 5/13
4/49*11 2/3
1 1/9: 5/6

вычислите
5,5/c-1,2=1 3/4

Answer 1

1)48:0,16=300.

2)

$\frac{13}{26} - \frac{5}{13} = \frac{1}{13} - \frac{5}{13} = - \frac{4}{13}$

3)

$\frac{4}{49} \times 11\frac{2}{3} = \frac{4}{49} \times \frac{35}{3} = \frac{4}{7} \times \frac{5}{3} = \frac{20}{21}$

4)

$\frac{11}{9} \div \frac{5}{6} = \frac{11}{9} \times \frac{6}{5} = \frac{11}{3} \times \frac{2}{5} = \frac{22}{15} = 4 \frac{2}{15}$

5)

$\frac{5.5}{c} - 1.2 = 1 \frac{3}{4} \\5 \frac{1}{2} \div c - 1 \frac{1}{5} = \frac{7}{4} \\ \frac{11}{2c} = \frac{6}{5} + \frac{7}{4} \\ \frac{11}{2c} = \frac{24}{20} + \frac{35}{20} \\ \frac{11}{2c} = \frac{59}{20} \\ 118c = 220 \\ c = \frac{220}{118} \\ c = \frac{110}{59} \\ c = 1 \frac{51}{59}$