гюйс

Verified answer

   ....................................=3

1)   7/15 - 3/40 - 1/24=56/120 - 9/120 - 5/120=42/120=7/20
2)   7/20 : 0,7=7/20 * 10/7=1/2=0,5
3)   2,4*1/3=24/10 * 1/3=8/10=0,8
4)   0,8-3= - 2,2
5)   - 2,2 * 5/11= - 22/10 * 5/11= - 1
6)   0,5 : (-1)= - 0,5
7)   3/4 - 1 2/3=9/12 - 1 8/12= - 11/12
8)   1 5/6 :( -11/12)= - 11/6 * 12/11= - 2
9)   4/9 - 5/12+0,75=4/9 - 5/12+3/4=16/36 - 15/36+27/36=28/36=7/9
10)   7/9 * 3/7=1/3
11)   -2 : 1/3= - 2*3= - 6
12)   - 0,5 * (-6)=3

теоретик5 (((7/15-3/40-1/24)÷0,7)/(2,4×1/3-3)×5/11))×((1 5/6÷(3/4-1 2/3))/((4/9--5/12+0,75)×3/7))=(((7/20)÷7/10)/((-11/5)×5/11))×((11/6÷(-11/12))/((7/9)×3/7))=
=(1/2÷(-1))×((-2)÷1/3)=-1/2×(-6)=3
Ответ: 3.