Matemáticas, pregunta formulada por SakuraUchihaHaruno, hace 1 año

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

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Contestado por belenletras
3
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}
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