Question

Oblicz , pamiętając o kolejności wykonywania działań.

a) 4 1/5 * 2,7 : 5, 67 =

b) 1,4 : 1/2 + 1/30 * 7,5 =

c) (8 1/2 - 4,75) : 15 =

d) (0,76 : 4,5 - 0,5) * 1 1/3 =

e) [(13 - 11 1/2) : 0,03] * 0,026 =

f) [1 5/7 : (3,6 - 1,8 * 1 1,3)] * 1,4 =

dzięki ;*

Answer 1

a)

 

c)

 

b)1,4:1/2 + 1/30*7,5 =

= 14/10 * 2  +  1/30 * 75/10 =

= 14/5 + 1/30 * 15/2 = 

= 14/5 + 1/2*1/2 =

= 14/5 + 1/4 =

= 56/20 + 5/20 =

= 61/20

 

d) (0,76 : 4,5 - 0,5) * 1 1/3 =

= (76/100 : 45/10 - 0,5) *4/3 = 

= (76/100 * 10/45 - 0,5) * 4/3 =

= (76/450 - 1/2)* 4/3 =

= (76/450 - 225/450)*4/3 =

= - 149/450 * 4/3 = - 596/ 1350 =

= - 298/675

 

e) (1 5/7 : (3,6 - 1,8*11,3))*1,4 =

= ( 13/7 : (36/10 - 18/10* 113/10))*14/10=

= (13/7 : ( 36/10 - 2034/100))*14/10 =

= (13/7 : (360/100 - 2034/100))*14/10 =

= (13/7 : (-1674/100))*14/10 =

= (13/7 * ( - 100/1674))*14/10 =

= - 1300/11718 * 14/10 = - 130/837