1) 87 : 3 = 29 ( дубков ) первое звено ;
2) 87 -( 25 + 29 ) = 87 -54 = 33 ( дубка ) третье звено ;
Ответ 33 дубка
1) ( 6 * ( 10 ^ 2 ) ^ 3 = 216 * ( 10 ^ 6 )
2) ( 216 * ( 10 ^ 6 )) * ( 16 * 10 ^ - 5 ) = ( 216 * 16 ) * ( 10 ^ 6 ) * ( 10 ^ - 5 )) = 3456 * 10 = 34560
6 7/12-3 17/36=6-3 7/12-17/36=3+21/36-17/36=3 4/36=3 1/9
4 1/3:65/100=13/3*100/65=1/3*100/5=100/15=20/3=6 2/3
3 1/9*2,5=28/9*5/2=14/9*5/1=70/9=7 7/9
<span>7 7/9-6 2/3=7-6 7/9-2/3=1-7/9-6*9=1 1/9</span>