Question

Oblicz i wynik zapisz jak najprościej:

3 1/4 - 1 1/2 + 2 7/8

21 . 1 1/14

1 2/5 . 3 1/3

(3/4) do kwadaratu

(1 1/2) do potęgi trzeciej

5/6 : 2/9

6:2 1/4

3 3/10 : 11

3 1/3 : 4 1/3

oblicz pamitając o kolejności wykonywania działań:

(2 2/3 . 7/8 - 1 1/2) : 4/9

5 1/6 : [12 . (1 5/6 + 3/4)]

pliss zróbcie to dobrze

Answer 1

A)  3 1/4 - 1 1/2 + 2 7/8 = 3 2/8 - 1 4/8 + 3 2/8 = 2 10/8 - 1 4/8 + 3 2/8 = 1 6/8 + 3 2/8 = 4 8/8 = 5

21 x 1 1/14 = 21/1 x 15/14 = 315/ 14= 22 1/2

1 2/5 x 3 1/3 = 11/5 x 10/3 = 110/15 = 7 5/15= 7 1/3

3/4 do 2= 3/4x 3/4 = 9/16

1 1/2 do 3= 1 1/2 x 1 1/2 x 1 1/2 = 3/2 x 3/2 x 3/2 = 9/4 x 3/2 = 27/8 = 9

5/6 : 2/9 = 5/6 x 9/2 = 45/12 = 3 9/12 = 3 3/4

6 : 2 1/4 = 6/1: 9/4 = 6/1 x 4/9 = 24/9 = 2 6/9 = 2 2/3

3 3/10 : 11= 3 3/10 : 11/1 = 33/10 x 1/11 = 33/110

3 1/3 : 4 1/3 = 10/3 : 13/3 = 10/3 x 3/13 = 30/39= 10/13

 

 zad.2 

  a)(2 2/3 *7/8 -1 1/2):4/9=(8/3 * 7/8 - 1 1/2):4/9=(7/3 - 3/2)* 9/4= (14/6-9/6)* 9/4= 5/6 * 9/4=45/54= 13/18
b)5 1/6:(12*(15/6 + 3/4))=31/6: (12*(30/12 + 9/12))=31/6 :(12*39/12)= 31/6:39=31/6 * 1/39=31/134