Question

POTRZEBNE MI SĄ CAŁE DZIAŁANIA!

a) -3 1/7 : 11

b) 2 1/4 : (-1 1/2 )

c) -1,21 + 5,1

d) -3,24 * (-0,2)

e) 0,24: (-0,4)

f) 2 3/4 * (-0,5)

g) -2,3 - 1/3

h) -3,75 : (-1 1/4)

i) 1/3 : (-0,7)

Answer 1

a) -3 i 1/7 : 11  = -22/7 · 1/11 = -2/7

 

b) 2 i 1/4 : (-1 1/2 )=9/4 :(-3/2) =9/4 ·(-2/3)= - 3/2 =-1½

 

c) -1,21 + 5,1 =-121/10 +51/10 =-70/10 =-7

 

d) -3,24 * (-0,2) = -324/100 · (-2/10)=-324/100 · (-1/5) =324/500 =81/125

 

e) 0,24: (-0,4) =24/100 :(-4/10)=24/10 ·(-10/4)=-6/10 =-0,6

 

f) 2 i 3/4 * (-0,5) =11/4 ·(-1/2)=-11/8 =-1 i 3/8

 

g) -2,3 - 1/3 -=-23/10 -1/3 =-69/30 -10/30 =-79/30 =-2 i 19/30

 

h) -3,75 : (-1i 1/4) =-375/100 :(-5/4) =-375/100 · (-4/5)=75/25= 3

 

i) 1/3 : (-0,7)=1/3 :(-7/10)=1/3 · (-10/7)=-10/21 

 

         

Answer 2

a) -3 1/7 : 11 = - 22/7 * 1/11 = -22/77 = -2/7

b) 2 1/4 : (-1 1/2 ) = 9/4 : (-3/2) = 9/4 * (-2/3) = -3/2= -1 1/2 

c) -1,21 + 5,1 = 3,89

d) -3,24 * (-0,2) = 0,648

e) 0,24: (-0,4) = - 0,6

f) 2 3/4 * (-0,5) = 11/4 * (-5/10) = 11/4 * (-1/2) = -11/8 = -1 3/8 

g) -2,3 - 1/3 = -2 3/10 - 1/3 = -23/10 - 1/3 = -69/30 - 10/30 = -79/30 = - 2 19/30

h) -3,75 : (-1 1/4) [0,75 to 3/4) = -3 3/4 : (-5/4) = - 15/4 * (-4/5) = 3

i) 1/3 : (-0,7) = 1/3 : (-7/10) = 1/3 * (-10/7) = -10/21