Question

64. Oblicz : a ) 5 i 1/2 x (1,5) do kwadratu - 4 i 5/7: 1 i 1/21 =
b) (3 i 3/4 x4/5-4,5:3,5)):24=
c) 11 i 1/4 x ( 1 i 2/3 - 1 i 19/21 x 0,7 )
d) 4 i 1/8 + ( 1,2 - 0,65 ) : 7 i 1/3 =
e) ( 2 i 1/3 - 1,6 ) : ( 1,25 x 0,88 ) =
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Answer 1

a ) 5 i 1/2 x (1,5)^2 - 4 i 5/7: 1 i 1/21 = 11/2*9/4-33/7*21/22=99/8-99/22=1089/88-396/88=693/88 = 7 77/88 = 7 7/8

b) (3 i 3/4 x4/5-4,5:3,5)):24= (15/4*4/5-45/10*10/35):24 = (3/1-9/7):24 = (21/7-9/7):24 = 12/7 * 1/24 = 1/14

c) 11 i 1/4 x ( 1 i 2/3 - 1 i 19/21 x  0,7 ) = 45/4*(5/3-40/21*7/10) = 45/4*(5/3-4/3) = 45/4*1/3 = 45/12 = 3 9/12 = 3 3/4

d)  4 i 1/8 + ( 1,2 - 0,65 ) : 7 i 1/3 = 33/8+55/100*3/22=33/8+5/100*1/2 = 33/8+5/200 = 825/200 + 5/200 = 830/200 = 4 15/100 = 4 3/20

e) ( 2 i 1/3 -  1,6 ) : ( 1,25 x 0,88 ) =(5/3-16/10):(5/4*22/25) = (50/30-48/30):11/10 = 1/15*10/11 = 1/3*2/11 = 2/33

Answer 2

a ) 5 i 1/2 x (1,5)^2 - 4 i 5/7: 1 i 1/21 = 11/2*9/4-33/7*21/22=99/8-99/22=1089/88-396/88=693/88 = 7 77/88 = 7 7/8
b) (3 i 3/4 x4/5-4,5:3,5)):24= (15/4*4/5-45/10*10/35):24 = (3/1-9/7):24 = (21/7-9/7):24 = 12/7 * 1/24 = 1/14
c) 11 i 1/4 x ( 1 i 2/3 - 1 i 19/21 x  0,7 ) = 45/4*(5/3-40/21*7/10) = 45/4*(5/3-4/3) = 45/4*1/3 = 45/12 = 3 9/12 = 3 3/4
d)  4 i 1/8 + ( 1,2 - 0,65 ) : 7 i 1/3 = 33/8+55/100*3/22=33/8+5/100*1/2 = 33/8+5/200 = 825/200 + 5/200 = 830/200 = 4 15/100 = 4 3/20
e) ( 2 i 1/3 -  1,6 ) : ( 1,25 x 0,88 ) =(5/3-16/10):(5/4*22/25) = (50/30-48/30):11/10 = 1/15*10/11 = 1/3*2/11 = 2/33