Question

A. 3/4 + 3/5 + 3/7
B. 3/4 - 3/5
C. 3/4 - 3/7 + 3/5
D. 8/9 + 1/2 + 1/3
E. 8/9 - 1/2
F. 8/9 - 1/3 + 1/2
G. 1 ¼ + 3/4 + 1/7
H. 1 ¼ - 3/4
I. 1 ¼ - 1/7 + 3/4
J. 11/4 + 25/5
K. 5/2 + 2/3
L. 24 - ⅓ - ⅙ - ⅖

Por favor y gracias.

Answer 1

Explicación paso a paso:

A. 3/4 + 3/5 + 3/7

$\frac{3}{4} + \frac{3}{5}- \frac{3}{7}=\frac{(3)(35) +(3)(28) -(3)(20) }{140} =\frac{105+84-60}{140} =\frac{129}{140}$

B. 3/4 - 3/5

$\frac{3}{4} - \frac{3}{5}=\frac{(3)(5) -(3)(4) }{20} =\frac{15-12}{20} =\frac{3}{20}$

C. 3/4 - 3/7 + 3/5

$\frac{3}{4} - \frac{3}{7}+ \frac{3}{5}=\frac{(3)(35) -(3)(20) +(3)(28) }{140} =\frac{105-60+84}{140} =\frac{129}{140}$

D. 8/9 + 1/2 + 1/3

$\frac{8}{9} + \frac{1}{2}+ \frac{1}{3}=\frac{(8)(2) +(1)(9) +(1)(6) }{18} =\frac{16+9+6}{18} =\frac{31}{18}$

E. 8/9 - 1/2

$\frac{8}{9} - \frac{1}{2}=\frac{(8)(2) -(1)(9) }{18} =\frac{16-9}{18} =\frac{7}{18}$

F. 8/9 - 1/3 + 1/2

$\frac{8}{9} - \frac{1}{3}+ \frac{1}{2}=\frac{(8)(2) -(1)(6) +(1)(9) }{18} =\frac{16-6+9}{18} =\frac{19}{18}$

G. 1 ¼ + 3/4 + 1/7

1 ¼ + 3/4 + 1/7

5/4 + 3/4 + 1/7

$\frac{5}{4} + \frac{3}{4}+ \frac{1}{7}=\frac{(5)(7) +(3)(7) +(1)(4) }{28} =\frac{35+21+4}{28} =\frac{60}{28} =\frac{15}{7}$

H. 1 ¼ - 3/4

1 ¼ - 3/4

5/4 - 3/4

$\frac{5}{4} - \frac{3}{4}=\frac{(5)(1) -(3)(1) }{4} =\frac{5-3}{4} =\frac{2}{4} =\frac{1}{2}$

I. 1 ¼ - 1/7 + 3/4

1 ¼ - 1/7 + 3/4

5/4 - 1/7 + 3/4

$\frac{5}{4} - \frac{1}{7}+ \frac{3}{4}=\frac{(5)(7) -(1)(4) +(3)(7) }{28} =\frac{35-4+21}{28} =\frac{52}{28} =\frac{13}{7}$

J. 11/4 + 25/5

$\frac{11}{4} + \frac{25}{5}=\frac{(11)(5) +(25)(4) }{20} =\frac{55+100}{20} =\frac{155}{20} =\frac{31}{4}$

K. 5/2 + 2/3

$\frac{5}{2} + \frac{2}{3}=\frac{(5)(3) +(2)(2) }{6} =\frac{15+4}{6} =\frac{19}{6}$