Question

Alguien que me ayude ?:(

Answer 1

Explicación paso a paso:

La suma o resta de fracciones es una de las operaciones básicas que permite combinar dos o más fracciones

Suma y resta de fracciones propias e impropias.

a.

$\frac{7}{12} + \frac{1}{4}- \frac{3}{8}=\frac{(7)(2) +(1)(6) -(3)(3) }{24} =\frac{14+6-9}{24} =\frac{11}{24}$

b.

$\frac{12}{5} - \frac{3}{4}+ 2=\frac{(12)(4) -(3)(5) +(2)(20) }{20} =\frac{48-15+40}{20} =\frac{73}{20}$

c.

$\frac{10}{3} + \frac{2}{7}- \frac{1}{2}=\frac{(10)(14) +(2)(6) -(1)(21) }{42} =\frac{140+12-21}{42} =\frac{131}{42}$

d.

$\frac{4}{9} + \frac{6}{18}- \frac{5}{3}=\frac{(4)(2) +(6)(1) -(5)(6) }{18} =\frac{8+6-30}{18} =\frac{-16}{18} =\frac{-8}{9}$

e.

$\frac{1}{2} + \frac{3}{4}+ \frac{1}{6}=\frac{(1)(6) +(3)(3) +(1)(2) }{12} =\frac{6+9+2}{12} =\frac{17}{12}$

f.

$2\frac{3}{4} - 3\frac{2}{3}- 4\frac{1}{2}=\frac{11}{4} - \frac{11}{3}- \frac{9}{2}=\frac{(11)(3) -(11)(4) -(9)(6) }{12} =\frac{33-44-54}{12} =\frac{-65}{12}$

g.

$3\frac{1}{4} - \frac{3}{2}+ 1\frac{1}{5}- \frac{2}{6}=\frac{13}{4} - \frac{3}{2}+ \frac{6}{5}- \frac{2}{6}=\frac{(13)(15) -(3)(30) +(6)(12) -(2)(10) }{60} =\frac{195-90+72-20}{60} =\frac{157}{60}$