А)13 2/5-11.2 : 9 1/3=б) 3,6+4,8* (8 3/4- 7 5/6)=

Question

А)13 2/5-11.2 : 9 1/3=
б) 3,6+4,8* (8 3/4- 7 5/6)=

Comments

решите пожалуйста,прошу

Answer 1

13 2/5 - 11 1/5 : 9 1/3
1) 11 1/5 : 9 1/3 = 56/5 : 28/3 = 56/5 * 3/ 28 = 6/5 = 1 1/5
2) 13 2/5 - 1 1/5 = 12 1/5

3.6 + 4.8* (8.3/4 - 7 5/6) 
1) 8 3/4 - 7 5/6 = 8 9/12 - 7 10/12 = 105/12 - 94/12 = 11/12
2) 4.8 * 11/12 = 4  4/5 * 11/12 = 24/5 * 11/12 = 22/5
3) 3.6 + 22/5 = 3 3/5 + 22/5 = 18/5 + 22/5 = 40/5 = 8