Question

Calcula: a) 4/5 - 1/4 x 7/3 b) (4/5 - 1/4 ) x 7/3 c) 2 x 3/5 - 4/7: 3/4 d) 3/5 : 4/7: 3/4 - 1 e) 9- 1/4 x 7/3 + 2/5 f) 9- 1/4 x (7/3 + 2/5) g) (9-1/4) x 7/3 + 2/5 h) 2/3: 3/4 - 1/5 x 3/7 URGENTE AYUDA POR FAVOR <3

Answer 1

$1) \frac{4}{5} - \frac{1}{4} . \frac{7}{3} = \frac{4}{5} - \frac{1.7}{4.3} = \frac{4}{5} - \frac{7}{12} = \frac{60:5.4-60:12.7}{60} = \frac{48-35}{60} = \frac{13}{60}$

$2) ( \frac{4}{5} - \frac{1}{4} ) . \frac{7}{3} = \frac{20:5.4-20:4.1}{20} . \frac{7}{3} = \frac{16-5}{20} . \frac{7}{3} = \frac{11}{20} . \frac{7}{3} = \frac{11.7}{20.3} = \frac{77}{60}$

$3) \frac{2}{1} . \frac{3}{5} - \frac{4}{7} : \frac{3}{4} = \frac{2.3}{1.5} - \frac{4.4}{7.3} = \frac{6}{5} - \frac{16}{21} = \frac{105:5.6-105:21.16}{105} = \frac{126-80}{105} = \frac{46}{105}$

$4) \frac{3}{5} : \frac{4}{7} : \frac{3}{4} - \frac{1}{1} = \frac{3.7}{5.4} : \frac{3}{4} - \frac{1}{1} = \frac{21}{20} : \frac{3}{4} - \frac{1}{1} = \frac{21.4}{20.3} - \frac{1}{1} = \frac{84}{60} - \frac{1}{1} =$ 
$\frac{60:60.84-60:1.1}{60} = \frac{84-60}{60} = \frac{24}{60} = \frac{4}{10} = \frac{2}{5}$

$5) \frac{9}{1} - \frac{1}{4} . \frac{7}{3} + \frac{2}{5} = \frac{9}{1} - \frac{1.7}{4.3} + \frac{2}{5} = \frac{9}{1} - \frac{7}{12} + \frac{2}{5} = \frac{60:1.9-60:12.7+60:5.2}{60} =$
$\frac{540-35+24}{60} = \frac{529}{60}$

$6) \frac{9}{1} - \frac{1}{4} . ( \frac{7}{3} + \frac{2}{5} ) = \frac{9}{1} - \frac{1}{4} . \frac{15:3.7+15:5.2}{15} = \frac{9}{1} - \frac{1}{4} . \frac{35+6}{15} = \frac{9}{1} - \frac{1}{4} . \frac{41}{15} =$
$\frac{9}{1} - \frac{1.41}{4.15} = \frac{9}{1} - \frac{41}{60} = \frac{60:1.9-60:60.41}{60} = \frac{540-41}{60} = \frac{499}{60}$

$7)( \frac{9}{1} - \frac{1}{4} ) . \frac{7}{3} + \frac{2}{5} = \frac{4:1.9-4:4.1}{4} . \frac{7}{3} + \frac{2}{5} = \frac{36-1}{4} . \frac{7}{3} + \frac{2}{5} = \frac{35}{4} . \frac{7}{3} + \frac{2}{5} =$
$\frac{35.7}{4.3} + \frac{2}{5} = \frac{245}{12} + \frac{2}{5} = \frac{60:12.245+60:5.2}{60} = \frac{1225+24}{60} = \frac{1249}{60}$

$8) \frac{2}{3} : \frac{3}{4} - \frac{1}{5} . \frac{3}{7} = \frac{2.4}{3.3} - \frac{1.3}{5.7} = \frac{8}{9} - \frac{3}{35} = \frac{315:9.8-315:35.3}{315} = \frac{280-27}{315} = \frac{253}{315}$