Odpowiedzi

2010-03-21T18:37:46+01:00
1 3/4 + 0,3 = 7/4+3/10 = (70+12)/40 = 82/40 = 2 i 1/20

2 1/2 x 0,4 = 5/2*4/10 = 20/20 = 1

3/5 x 1,1 = (12+22)/20 = 34/20 = 17/10 = 1,7

1 3/5 - 0,6 = 8/5-6/10 = (16-6)/10 = 10/10 = 1

11/20 - 0,45 = (55-45)/100 = 10/100 = 0,1

2/5 : 0,2 = 2/5 *10/2 = 2/1 = 2

1,2 : 3/5 = 12/10*5/3 = 4/2 = 2