Question

ajutatima va rog frumos nu pot imi trebuie urgent pîna maine​

Answer 1

Bună! Răspunsul este mai jos.

$a) \: 3 \frac{5}{7} + 4\frac{11}{14}$

$= \frac{3 \times 7 + 5}{7} +\frac{4 \times 14 + 11}{14}$

$= \frac{2)26}{7} + \frac{67}{14}$

$= \frac{52}{14} + \frac{67}{14}$

$= \frac{119(7}{14}$

$= \frac{17}{2}$

$b) \: 7 - 2 \frac{1}{3}$

$= \frac{7}{1} - \frac{2 \times 3 + 1}{3}$

$= \frac{3)7}{1} - \frac{7}{3}$

$= \frac{21}{3} - \frac{7}{3}$

$= \frac{14}{3}$

$c) \: 2\frac{1}{7} \times 0.7$

$= \frac{2 \times 7 + 1}{7} + \frac{7}{10}$

$= \frac{15}{7} \times \frac{7}{10}$

$= \frac{105}{70}$

$d) \: 1 \frac{1}{9} \div 0.(4)$

$= \frac{1 \times 9 + 7}{9} \div \frac{4}{9}$

$= \frac{16}{9} \div \frac{4}{9}$

$= \frac{16}{9} \times \frac{9}{4}$

$= \frac{144}{36}$

$= 4$

Answer 2

Explicație pas cu pas:

a)

$3 \frac{^{2)} 5}{7} + 4 \frac{11}{14} = 3 \frac{10}{14} + 4 \frac{11}{14} = 7 \frac{10 + 11}{14} = 7 \frac{21^{(7}}{14} = 7 \frac{3}{2} = 8 \frac{1}{2}$

b

$7 - 2 \frac{1}{3} = \frac{21}{3} - \frac{7}{3} = \frac{14}{3} = 4 \frac{2}{3}$

c)

$2 \frac{1}{7} \cdot 0.7 = \frac{15}{7} \cdot \frac{7}{10} = \frac{3}{2}$

d)

$1 \frac{1}{3} : 0.(4) = \frac{4}{3} : \frac{4}{9} = \frac{4}{3} \cdot \frac{9}{4} = 3$