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To 12 i 13 Plis to na jutro
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To 12 I 13 Plis To Na Jutro class=

Odpowiedź :

123bodzio

Odpowiedź:

12.

a) 1 1/4 + 2/7 = 1 7/28 + 8/28 = 1 15/28

b) 1 3/5 + 3 3/4 = 1 12/20 + 3 15/20 = 4 27/20 = 5 7/20

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

d) 6 1/8 - 5 3/4 = 6 3/24 - 5 18/24 = 5 27/24 - 5 18/24 = 9/24 = 3/8

13.

a)

5/6 : 10 + 1 3/4 : 3 = 5/6 * 1/10 + 7/4 * 1/3 = 1/6 * 1/2 + 7/12 = 1/12 + 7/12 =

= 8/12 = 2/3

b)

(2 3/4 - 1 1/2)² : 4 = ( 2 3/4 - 1 2/4)² * 1/4 = (1 1/4)² * 1/4 = (5/4)² * 1/4 =

= 25/16 * 1/4 = 25/64

Odpowiedź:

1 i 1/4 + 2/7 = 1 i 7/28 + 8/28 = 1 i 15/28

1 i 3/5 + 3 i 3/4 = 1 i 12/20 + 3 i 15/20 = 4 i 27/20 = 5 i 7/20

5 i 2/3 - 3 i 3/5 = 5 i 10/15 - 3 i 9/15 = 2 i 1/15

6 i 1/8 - 5 i 3/4 = 6 i 1/8 - 5 i 6/8 = 5 i 9/8 - 5 i 6/8 = 3/8

zad 13

5/6 : 10 + 1 i 3/4 : 3 = 5/6 * 1/10 + 7/4 * 1/3 = 1/12 + 7/12 = 8/12 = 2/3

(2 i 3/4 - 1 i 1/2)² : 4 = (2 i 3/4 - 1 i 2/4)² : 4 = (1 i 1/4)² : 4 = (5/4)² : 4 = 25/16 * 1/4 = 25/64

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