Question

Calculați ex 10 tot ajutor cat mai repede va rog

Answer 1

Răspuns:

Vezi rezolvarile mai jos:

Explicație pas cu pas:

$a) \frac{3}{4}+\frac{5}{8} = \frac{3*8}{4*8} + \frac{5*4}{8*4} = \frac{24}{32} + \frac{20}{32} = \frac{24+20}{32} = \frac{44}{32} \\\\b) \frac{7}{12} +\frac{2}{3}= \frac{7}{12} +\frac{2*4}{3*4} = \frac{7}{12} +\frac{8}{12} = \frac{7+8}{12} = \frac{15}{12} \\\\c) \frac{5}{6} + \frac{1}{24} = \frac{5*4}{6*4} + \frac{1}{24} = \frac{20}{24} + \frac{1}{24} = \frac{20+1}{24} = \frac{21}{24} \\\\d) \frac{5}{9} +\frac{2}{3} = \frac{5}{9} + \frac{2*3}{3*3} = \frac{5}{9} + \frac{6}{9} = \frac{5+6}{9} = \frac{11}{9}$

$e) \frac{4}{5} + \frac{8}{15} = \frac{4*3}{5*3} + \frac{8}{15} = \frac{12+8}{15} = \frac{20}{15} \\\\f) \frac{1}{4} + \frac{5}{7} = \frac{1*7}{4*7} + \frac{5*4}{7*4} = \frac{7+20}{28} =\frac{27}{28}\\\\g) \frac{1}{3} + \frac{1}{5} = \frac{1*5}{3*5} + \frac{1*3}{5*3} = \frac{5+3}{15} = \frac{8}{15} \\\\h) \frac{2}{7} + \frac{3}{8} = \frac{2*8}{7*8} + \frac{3*7}{8*7} = \frac{16+21}{56} = \frac{37}{56} \\\\i) \frac{7}{25} + \frac{4}{10} = \frac{7*2}{25*2} + \frac{4*5}{10*5} = \frac{14+20}{50} = \frac{34}{50}$

$j) \frac{13}{18} + \frac{5}{12} = \frac{13*2}{18*2} + \frac{5*3}{12*3} = \frac{26+15}{36} = \frac{41}{36} \\\\k) \frac{7}{18} + \frac{2}{15} = \frac{7*5}{18*5} + \frac{2*6}{15*6} = \frac{35+12}{90} = \frac{47}{90} \\\\l) \frac{5}{6}+ \frac{3}{4}  = \frac{5*2}{6*2} + \frac{3*3}{4*3} = \frac{10+9}{12} = \frac{19}{12}$