2+3=5
5/2=2ost1
2+4=6
6/2=3
2.4.6 i t.d chetniye chisla
5.7.9 i t.d ne chetniye
<span> (14-12,6)*4,3+1,08:1,2=6,92
1)14-12,6=1,4
2) 1,4*4,3=6,02
3)1,08:1,2=0,9
4)6,02+0,9=6,92</span>
3 1/11 * 4 2/5 + 1 5/11 * 4 2/5 =
= 4 2/5 * ( 3 1/11 + 1 5/11 )=
= 4 2/5 * 4 6/11 = 22/5 * 50/11 =
= (2*10)/(1*1) = 20
2 3/8 * 3 1/13 + 5/12 * 3 1/13 - 3 1/13 * 1 1/6 =
= 3 1/13 * ( 2 3/8 + 5/12 - 1 1/6 ) =
= 3 1/13 * ( 2 9/24 + 10/24 - 1 4/24 )=
= 3 1/13 * 1 15/24 = 3 1/13 * 1 5/8 =
= 40/13 * 13/8 = 5
Неизвестное число x. 2.7x+162=5.7x 5.7x-2.7x=162 3x=162 x=162/3 x=54