Matematică, întrebare adresată de NinaRoGirl, 9 ani în urmă

1,5+3,(3)+2,1(6)
3,2(6)+0,8+2,(3)
1,2(6)+0,75+0,(3)
1,(6)+0,2(7)+0,25
Va rog dau coroana


hekamarip50piz: Ce este cu (3) si (6)
hekamarip50piz: Nu inteleg si sunt in clasa a 3 a
NinaRoGirl: atuncea ce te bagi la exerciti asa grele pt tine

Răspunsuri la întrebare

Răspuns de Utilizator anonim
2
1.5 + 3.(3) + 2.1(6)

 = \frac{15}{10} + \frac{33 - 3}{9} + \frac{216 - 21}{90}

 = \frac{15}{10} + \frac{30}{9} + \frac{195}{90}

 = \frac{3}{2} + \frac{10}{3} + \frac{39}{18}

 = \frac{3}{2} + \frac{10}{3} + \frac{13}{6}

 = \frac{9}{6} + \frac{20}{6} + \frac{13}{6}

 = \frac{9 + 20 + 13}{6}

 = \frac{42}{6}

 = 7

3.2(6) + 0.8 + 2.(3)

 = \frac{326 - 32}{90} + \frac{8}{10} + \frac{23 - 2}{9}

 = \frac{294}{90} + \frac{8}{10} + \frac{21}{9}

 = \frac{98 }{30} + \frac{4}{5} + \frac{7}{3}

 = \frac{49}{15} + \frac{4}{5} + \frac{7}{3}

 = \frac{49}{15} + \frac{12}{15} + \frac{35}{15}

 = \frac{49 + 12 + 35}{15}

 = \frac{96}{15}

 = \frac{32}{5}

1.2(6) + 0.75 + 0.(3)

 = \frac{126 - 12}{90} + \frac{75}{100} + \frac{3}{9}

 = \frac{114}{90} + \frac{75}{100} + \frac{3}{9}

 = \frac{38}{30} + \frac{3}{4} + \frac{1}{3}

 = \frac{19}{15} + \frac{3}{4} + \frac{1}{3}

 = \frac{76}{60} + \frac{45}{60} + \frac{20}{60}

 = \frac{76 + 45 + 20}{60}

 = \frac{139}{60}

1.(6) + 0.2(7) + 0.25

 = \frac{16 - 1}{9} + \frac{27 - 2}{90} + \frac{25}{100}

 = \frac{15}{9} + \frac{25}{90} + \frac{25}{100}

 = \frac{5}{3} + \frac{5}{18} + \frac{1}{4}

 = \frac{60}{36} + \frac{10}{36} + \frac{9}{36}

 = \frac{60 + 10 + 9}{36}

 = \frac{79}{36}
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