Question

exercitiul 10
ajutatima dau multe puncte minim 5​

Answer 1

Răspuns:

Bună!Trebuie sa calculez oral,fara sa scrii.7+4=11 sub 26.si tot asa,ca 13+13=26

Answer 2

Răspuns:

a)  $\frac{11}{13}$

b)  $\frac{13}{15}$

c)  $\frac{1}{3}$

d)  $\frac{9}{35}$

e)  $\frac{1}{8}$

f)  $\frac{5}{3}$

g)  $\frac{3}{4}$

h)  $\frac{2}{5}$

Explicație pas cu pas:

a)  $\frac{7}{13} + \frac{4}{13} = \frac{7+4}{13} = \frac{11}{13}$

b)  $\frac{11}{15} + \frac{2}{15} = \frac{13}{15}$

c)  $\frac{13}{18} - \frac{7}{18} = \frac{13-7}{18} = \frac{6}{18} = \frac{1}{3}$

d)  $\frac{22}{35} - \frac{13}{35} = \frac{22-13}{35} = \frac{9}{35}$

e)  $\frac{7}{12} *\frac{3}{14} = \frac{7*3}{12*14} = \frac{21}{168} = \frac{1}{8}$

f)  $2\frac{1}{7} *\frac{7}{9} = \frac{15*7}{7*9} = \frac{15}{9} = \frac{5}{3}$

g)  $\frac{2}{3} : \frac{8}{9} = \frac{2}{3} * \frac{9}{8} = \frac{18}{24} = \frac{3}{4}$

h)  $\frac{1}{6} : \frac{5}{12} = \frac{1}{6} * \frac{12}{5} = \frac{2}{5}$