Question

1.Oblicz(Zapisa taki jak 4(to jest calosc)a np 1/3(to jest w ulamku):

a)-3/4+5/6=

b)5/6-8/9=

c)1 1/6-7/9=

d)3/5-1 2/3=

e)2 2/9+1 5/12=

f) 1 1/7+ 2 2/3=

g)3 2/5-5 2/3=

h)4 1/6- 2 7/15=

2.Oblicz:

a)-2 1/3 *(-27/28)

b)3 1/2-3 1/6 :(-21/9)

c)-1 1/7*1 11/24:3/5

Answer 1

1)

a) - 3/4 + 5/6= - 9/12 + 10/12= 1/12

b) 5/6 - 8/9 = 15/18 - 16/18= 31/18= 1 13/18

c) 1 1/6 - 7/9 = 1 3/18 - 14/18= 21/18- 14/18= 7/18

d) 3/5 - 1 2/3= 9/15 - 1 10/15= - 1 1/15

e) 2 2/9 + 1 5/12 = 2 8/36 + 1 15/36= 3 23/36

f) 1 1/7 + 2 2/3 = 1 3/21 + 2 14/21= 3 17/21

g) 3 2/5 - 5 2/3= 3 6/15 - 5 10/15= - 2 4/15

h) 4 1/6 - 2 7/15= 4 5/30 - 2 14/30= 3 35/30 - 2 14/30= 1 21/30

 

2)

a) - 2 1/3 x (- 27/28) = - 7/3 x (- 27/28)= 27/12= 2 3/12= 2 1/4

b) 3 1/2 - 3 1/6 : (-2 1/9)= 3 1/2 - 19/6 : (- 19/9)= 3 1/2 - 19/6 x (- 9/19)=

    = 3 1/2 + 3/2= 3 4/2= 5