Question

Hola necesito ayuda es para hoy a la noche .

Answer 1

Respuesta:

$1.$

$a)8 \times ( - \frac{9}{20} ) \times \frac{10}{27} = \\ - \frac{18}{5} \times \frac{10}{27} = \\ - \frac{4}{3}$

$b) \frac{15}{36} \div \frac{3}{8} \times ( - \frac{12}{5 } ) = \\ \frac{15}{36} \times \frac{8}{3} \times ( - \frac{12}{5} ) = \\ \frac{10}{9} \times ( - \frac{12}{5} ) = \\ - \frac{8}{3}$

$c) \frac{14}{30} \times ( - \frac{5}{15} ) \div \frac{7}{3} \times ( - \frac{3}{4} ) = \\ \frac{7}{15} \times ( - \frac{1}{3} ) \times \frac{3}{7} \times ( - \frac{3}{4} ) = \\ ( - \frac{7}{45} ) \times ( - \frac{9}{28} ) = \\ \frac{1}{20}$

$2.$

$a)3 \times ( \frac{1}{6} + \frac{3}{4} ) + \frac{9}{4} = \\ 3 \times ( \frac{2}{12} + \frac{9}{12} ) + \frac{9}{4} = \\ 3 \times \frac{11}{12} + \frac{9}{4} = \\ \frac{11}{4} + \frac{9}{4} = \\ \frac{20}{4} = 5$

$b)( \frac{1}{8} - \frac{1}{3} ) \times 4 - \frac{7}{6} = \\ ( \frac{3}{24} - \frac{8}{24} ) \times 4 - \frac{7}{6} = \\ - \frac{5}{24} \times 4 - \frac{7}{6} = \\ - \frac{5}{6} - \frac{7}{6} = \\ - \frac{12}{6} = - 2$

$3.$

$a) - 4 + 5 \times (0.1 + 1.25) = \\ - 4 + 5 \times ( \frac{1}{10} + \frac{5}{4} ) = \\ - 4 + 5 \times ( \frac{4}{40} + \frac{50}{40} ) = \\ - 4 + 5 \times \frac{54}{40} = \\ - 4 + \frac{27}{4} = \\ - \frac{16}{4} + \frac{27}{4} = \\ \frac{11}{4}$

$b) - \frac{2}{9} \times \frac{12}{8} + {( \frac{3}{2} )}^{2} \div \frac{18}{6} - 0.25 = \\ - \frac{2}{9} \times \frac{3}{2} + \frac{9}{4} \times \frac{1}{3} - \frac{1}{4} = \\ - \frac{1}{3} + \frac{3}{4} - \frac{1}{4} = \\ - \frac{4}{12} + \frac{9}{12} - \frac{3}{12} = \\ \frac{2}{12} = \frac{1}{6}$

$c)0.2 \times \frac{3}{16} \times \frac{10}{6} - (3 + \frac{1}{8} ) \div ( - 2 + \frac{7}{4} ) = \\ \frac{1}{5} \times \frac{3}{16} \times \frac{5}{3} - ( \frac{24}{8} + \frac{1}{8} ) \div ( - \frac{8}{4} + \frac{7}{4} ) = \\ \frac{1}{16} - \frac{25}{8} \div ( - \frac{1}{4} ) = \\ \frac{1}{16} - \frac{25}{8} \times ( - 4) = \\ \frac{1}{16} - ( - \frac{25}{2} ) = \\ \frac{1}{16} + \frac{200}{16} = \\ \frac{201}{16}$

Answer 2

Respuesta:

Hola ! yo te ayudo

1.

a) 8 * (-9/20) * 10/27

8* (-9/20) = -18/5  

-18/5 * 10/27 = -4/3  

RPTA: -4/3

b) 15/36 : 3/8 * (-12/5)

15/36 * 8/3 * (-12/5)

10/9 * (-12/5)

-8/3

RPTA: -8/3

c) 14/30 * (-5/15) : 7/3 * (-3/4)

14/30 * (-5/15) = -7/45

7/3 * (-3/4) = -7/4

- 7/45 : -7/4 = 4/45

2.

a) 3 * (1/6 + 3/4)  + 9/4

3 * 11/12 + 9/4

11/4 + 9/4 = 5

b) (1/8 - 1/3) * 4 -7/6

-5/24 * 4 -7/6

-5/6 - 7/6 = -2

3.

a) -4 -5 * ( 0,1 + 1,25)

5*(0,1 + 1,25) = 6,75

-4 - 6,75 = -10, 75

bueno hasta ahi lo dejo y actualizare mas tarde, espero haberte ayudado y si puedes me pones la coronita y no te olvides de dejar tu like :)

 

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