Question

2.Oblicz:

⁷/₆ + (-⁵/₄ - ⁴/₃)

3.Oblicz

⁶/₁₁ -¹⁵/₄₅

------------ × 2¹/₄

¹¹/₃ - 2¹/₂

7. Oblicz:

a) ²/₃ - [0,8 × ³/(-₂)² - (⁻⁴/₅)] : (-1¹/₂)

b) (¹/₃ - ¹/₂) : (⁵/₃- ⁵/₄) - (0,25 - ³/₈ : 0,625)

Answer 1

2.
7/6+(-5/4 - 4/3)= 7/6+(-10/12 - 16/12)= 7/6+ 6/12=14/12+6/12=20/12= 1 8/12

Answer 2

2.

7/6+(-5/4-4/3)=7/6+(-15/12-16/12)=7/6+(-31/12)=7/6-31/12=14/12-31/12=-17/12=

=-1 5/12

3.

6/11-15/45            270/495-165/495              105/495             7/33

-------------- x 2¼=------------------------x2¼= -------------x2¼ = --------x2¼=

11/3 - 2½                   22/6-2 3/6                  22/6-15/6            7/6

 

=7/33*6/7*9/4=1/33*6/1*9/4=54/132=9/22