Działania Na Ułamkach Zwykłych : 5 3/5 - (7 1/2 - 3 3/20) = 8 3/7 - (5 8/21 - 3 3/14 ) = daje 20 Punktów za to zadanie :)

5 3/5 - (7 1/2 - 3 3/20) = 5 3/5 -(7 10/20-3 3/20)=5 3/5 -4 7/20= 5 12/20- 4 7/20=1 5/20 8 3/7 - (5 8/21 - 3 3/14 ) =8 3/7 - (5 112/294- 3 63/294)=8 3/7 - 2 49/294=8 126/294 -2 49/294= 6 77/294= 6 11/42 Pozdrawiam:)

1. 28/5-(15/2-63/20)=112/20-(150/20-63/20)=112/20-87/20=25/20=1 5/20=1 1/4 2. 59/7-(113/21-45/14)=354/42-(226/42-135/42)=354/42-91/42=263/42=6 11/42

5 3/5-(15/2 - 63/20)=5 3/5-(150/20-63/20)=5 3/5-87/20=28/5-87/20= 152/20-87/20=65/20=3 1/4 8 3/7-(113/21-45/14)=8 3/7-(226/42-135/42)=8 3/7-91/42=59/7-91/42=354/42-91/42=263/42=6 11/42