Question

도와주세요
ajutatima va rog​

Answer 1

Răspuns:

Sper ca te-am ajutat!

Explicație pas cu pas:

a)

$- \frac{2}{7} - ( - \frac{5}{7} ) = - \frac{2}{7} + \frac{5}{7} = \frac{3}{7}$

b)

$- \frac{4}{3} - ( + \frac{70}{3} ) = \frac{ - 4 - 70}{3} = - \frac{74}{3}$

c)

$\frac{9}{4} - ( - \frac{3}{4} ) = \frac{9}{4} + \frac{3}{4} = \frac{12}{4} = 3$

d)

$+ \frac{1}{3} - ( + \frac{1}{6} ) = \frac{2 - 1}{6} = \frac{1}{6}$

e)

$- \frac{2}{5} - ( - \frac{7}{10} ) = - \frac{2}{5} + \frac{7}{10} = \frac{3}{10}$

f)

$\frac{5}{12} - ( - \frac{1}{6} ) = \frac{5}{12} + \frac{1}{6} = \frac{7}{12}$

g)

$- \frac{1}{24} - ( + \frac{9}{8} ) = - \frac{1 + 27}{24} = - \frac{28}{24} = - \frac{7}{6}$

h)

4,5 - ( 4,5 - 3 ) = 4,5 - 1,5 = 3

i) -7,7 - ( -2,8 ) - 9 = - 7,7 + 2,8 - 9 = -4,9 - 9 = -13,9