A. 1/2 + 2/3

Jawab:

A. 7/6

B. 1/20

C. 59/40

D. -1/35

E. -5/4

Penjelasan dengan langkah-langkah:

A. 1/2 + 2/3

(1/2)*(3/3) + (2/3)*(2/2)

= 3/6 + 4/6

A. = 7/6

_______

B. 4/5 – 3/4

(4/5)*(4/4) – (3/4)*(5/5)

= 16/20 – 15/20

B. = 1/20

________

C. 7/8 + 3/5

(7/8)*(5/5) + (3/5)*(8/8)

= 35/40 + 24/40

C. = 59/40

________

D. -3/7 + 2/5 = 2/5 – 3/7

(2/5)*(7/7) – (3/7)*(5/5)

= 14/35 – 15/35

D. = -1/35

________

E. -3/4 = -0,75; 1/2 = 0,5

-0,75 – 0,5

= -1,25

= – (1 1/4)

= – [(4*1)+1]/4

E. = -5/4