A =1/10

B =3 3/5

C =-6 1/8

D =2 93/160

A =-2/3

B =3/5

A =8,22

B = 4 3/10

C =41/35

D =2 223/364

A = 1 1/4

B =1 11/52

A = 3/5 × 6/7 + 3/7 × 3/5 - 2/7 × 3/5

= 3/5

B = -12

C = 0

D = -4

P = 2/3 + 1/4 + 3/5 - 7/45 + 5/9 + 1/12 + 1/35

P = 2 × 105/315 + 1 × 79/315 + 3 × 63/315 - 7×7/315 + 5 × 5/315 1 × 26 × 25/315 + 1 × 9/315

P = 210/315 + 79/315 + 189/315 - 49/315 + 175/315 + 26 × 25/315 + 9/315

P = 210 + 79 + 189 - 49 + 175 + 26 × 25 + 9 /315

P = 639 × 25/315 = 2557/1260

Q = 5 - 3/4 + 1/5 - 6 - 7/4 + 8/5 - 2 + 5/4 - 16/5

Q = [ 5 - 6 - 2 ] + [ - 3/4 -7/4 + 5/4 ] + [ 1/5 + 8/5 - 16/5 ]

Q = -3 + -3 - 7 + 5/4 + 1 + 8 - 16/5

Q = -3 + -5/4 + -7/5

Q = -3 - 5/4 - 7/5

Q = -3 × 20/20 - 5 × 5/20 - 7 × 4/20

Q = -60 - 25 - 28

Q = -113/20

A = 1/3 - 8/15 - 1/7 + 2/3 -7/15

+8/7

A = [1/3 + 2/3] + [ -8/15 - 7/15 ] [ -1/7 +8/7 ]

A = 3/3 - 15/15 + 7/7

A = 1 - 1 + 1

A = 1

B = 1/4 -3/5 - [ 1/8 - 2/5 + 5/4 ]

B = 1/4 + 3/5 - 1/8 + 2/5 - 5/4

B = [ 1/4 -5/4 ] + [ 3/5 + 2/5 ] - 1/8

B = -4/4 + 5/5 - 1/8

B = -1 + 1 - 1/8

B = -1/8