( 13 1/4 - 2 5/27)×230 1/25+ 46 3/4 ÷ (1 3/7 +10/3 )÷(12 1/3-14 2/7) = 2550 <span>6207/16400</span><span>
</span><span>1) 13 1/4 - 2 5/27 = 53/4-59/27 = 1431/108-236/108 = 1195/108
2) </span>1 3/7 +10/3 = 10/7+10/3 = 30/21+70/21 = 100/21
3) 12 1/3-14 2/7 = 37/3-100/7 = 259/21-300/21 = -41/21
4) 1195/108*230 1/25 = 1195/108*5751/25=50907/20
5) 46 3/4:100/21=187/4*21/100 = 3927/400
6) 3927/400:(-41/21)=3927/400*(-21/41)=82467/16400
7) 50907/20+82467/16400=41743740/16400+82467/16400 = 41826207/16400 = 2550 <span>6207/16400</span>
-0,(2) ; -0,21212121....=-0,(21); -0,(2); 1 1/11 ; 1 1/9 =1,(1); 1,112
<em>1)12-9=3 камушка</em>
<em>Ответ: 3 камушка и 6 ракушек.
</em><em><u>Но если вопрос в том, сколько всего, то:</u></em>
<em>2)3+6=9</em>
<em>- вместе и ракушек и камушков.</em>
(√3+7)²=3+2*√3*7+49=3+14√3+49=52+14√3
<span>1/2 2/5 3/5 3/4 5/6 4/5 7/8 7/5 5/3 19/33 3/5 3/7 7/8 5/7 2/5 3/5
Наверно так
</span>