(3/7-1/4)+(2/3-3/5)+0,5.

Question

(3/7-1/4)+(2/3-3/5)+0,5.

---

Comments

= 12-7/28 + 10-9/15 + 1/2= 5/28+1/15+1/2=75+28+210/420=313/420

Answer 1

12/28 - 7/28 = 5/28

10/15 - 9/15 = 1/15

5/28 + 1/15 = 75/420 + 28/420 = 103/420

103/420 + 5/10 = 103 /420 + 210/420 = 313/420