Question

Решите 21 плииз,скоро звонок (по действиям)

Answer 1

23 / (6 5/17 + 1 12/17) - (4 2/5 - 2 3/5) / 5  
1) 6 5/17 + 1 12/17 = 6 + 1 + (5/17 + 12/17) = 7 + (17/17) = 7 + 1 = 8
2) 4 2/5 - 2 3/5 = 1 + (7/5 - 3/5) = 1 + 4/5 = 1 4/5
3) 23 / 8 = 23/8
4) 1 4/5  / 5 = 9/5  / 5 = 9/25
5 23/8 - 9/25 = 575/200 - 72/200 =503//200 = 2 103/200