Question

necesito ayuda porfaaaa:(((​

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

a)

$\frac{-5}{9} + \frac{3}{7}=\frac{(-5)(7) + (3)(9) }{63} =\frac{-35+27}{63} =\frac{-8}{63}$

b)

$\frac{8}{25} + \frac{12}{45}=\frac{(8)(9) + (12)(5) }{225} =\frac{72+60}{225} =\frac{132}{225} =\frac{44}{75}$

c)

$\frac{4}{25} + \frac{5}{32}=\frac{(4)(32) + (5)(25) }{800} =\frac{128+125}{800} =\frac{253}{800}$

d)

$\frac{-15}{9} + \frac{1}{24}=\frac{(-15)(8) + (1)(3) }{72} =\frac{-120+3}{72} =\frac{-117}{72} =\frac{-13}{8}$

e)

$\frac{9}{18} + \frac{2}{14}=\frac{(9)(7) + (2)(9) }{126} =\frac{63+18}{126} =\frac{81}{126} =\frac{9}{14}$

f)

$\frac{-4}{12} + \frac{6}{30}=\frac{(-4)(5) + (6)(2) }{60} =\frac{-20+12}{60} =\frac{-8}{60} =\frac{-2}{15}$

g)

$\frac{-5}{12} + (\frac{-2}{15})=\frac{(-5)(5) + (-2)(4) }{60} =\frac{-25-8}{60} =\frac{-33}{60} =\frac{-11}{20}$

h)

$\frac{-4}{9} + (\frac{-11}{7})=\frac{(-4)(7) + (-11)(9) }{63} =\frac{-28-99}{63} =\frac{-127}{63}$

i)

$\frac{4}{12} + (\frac{-6}{46})=\frac{(4)(23) + (-6)(6) }{276} =\frac{92-36}{276} =\frac{56}{276} =\frac{14}{69}$

j)

$\frac{10}{12} + \frac{4}{15}=\frac{(10)(5) + (4)(4) }{60} =\frac{50+16}{60} =\frac{66}{60} =\frac{11}{10}$