Question

a) ¾+⅔÷ (-8/12 )=

b) (⅓ +2/7 ) ÷ (1-1/9 ) + =

c) 1,6· 7/16 - 2,7/3^3 =

Answer 1

a)¾+⅔+(-8/12)=9/12+8/12+(-3/4)=17/12+(-9/12)=8/12

b)(⅓ +2/7 ) ÷ (1-1/9 ) +(czegoś tu nie brakuje?) =(7/21+6/21)+(9/9-1/9)=13/21+8/9=39/63+56/63=95/63 hm... nie wiem czy dobrze...

c)1,6*7/16-2,7/3^3=1 i 3/5 *7/16-2,7/27=8/5*7/16-2,7/27=56/80-0,1=56/80-1/10=56/80-8/80=48/80=24/40=12/20=6/10=3/5 skróciłem ułamek :)

Answer 2

a) 3/4 + 2/3 :(-8/12)= 3/4 + 2/3*(-12/8) = 3/4 +1/1*(-4/4)= 3/4-4/4= - 1/4

 

b) (1/3 + 2/7): (1-1/9)= (7/21 + 6/21):(9/9-1/9)= 13/21:8/9=13/21*9/8=

     = 13/7 * 3/8 = 39/56 

 

c) 1,6 * 7/16 - 2i7/3^3 = 16/10*7/16 - 2 i7/27 = 1/10 * 7/1  - 2i 7/27 =

     = 7/10 - 2 i7/27 = 189/270 - 2 i 70/270 = 189/270-1i340/270= -1 i 151/270