Вычислить: -3/16: 0,25+6. и 2 1/2*2/5+3/5: 5/6-1: 1 1/9

- 3/16 : 0,25 + 6 = 5,25
1) - 3/16 : 1/4 = - 3/16 * 4 = - 3/4 = - 0,75
2) - 0,75 + 6 = 6 - 0,75 = 5,25

2 1/2 * 2/5 + 3/5 : 5/6 - 1 : 1 1/9 = 41/50 
1) 2 1/2 * 2/5 = 5/2 * 2/5 = 1
2) 3/5 : 5/6 = 3/5 * 6/5 = 18/25 
3) 1 : 1 1/9 = 1 : 10/9 = 1 * 9/10 = 9/10 
4) 1 + 18/25 = 1 18/25
5) 1 18/25 - 9/10 = 1 36/50 - 45/50 = 86/50 - 45/50 = 41/50 = 0,82