Question

Oblicz 12 1/2 : 1/5* 2,5= 2 3/4:2,75= 3 3/4 + 0,28*11/14= 5,7: (5 3/7 - 3,8) = 4,08-2,08:13/25=

Answer 1

12 1/2:1/5*2/5=25/2*5/1*2/5=25

2 3/4:2,75=2,75:2,75=1

3 3/4+28/100*11/14=3 3/4+11/50=3,75+0,22=3,97

5,7:(5 3/7-3/8)=5 7/10:5 3/56=57/10*56/283=1596/1415=1 181/1415

4,08-2,08:13/25=4,08-208/100*25/13=4,08-4=0,8

Answer 2

12 1/2 : 1/5* 2,5= 12,5 : 0,2 * 2,5 = 25 * 2,5 = 62,5

2 3/4:2,75= 2,75 : 2,75 = 1

3 3/4 + 0,28*11/14= 3,75 + 28/100 * 11/14 = 3,75 + 22/100 = 3,75 + 0,22 = 3,97

5,7: (5 3/7 - 3,8) =5,7 : (38/7 - 38/10) = 5,7 : (38/7 - 19/5) = 5,7 : (190/35 - 133/35) = 57/10 : 57/35 = 57/10 * 35/57 = 7/2 = 3,5

4,08-2,08:13/25= 4,08 - 2,08 : 0,52 = 4,08 - 4 = 0,08