А) z=239.4
B)z=12.2
C)z=0.5
D)z=3.63
3(целых)<span>3/8</span> × 1(целых)<span>1/15</span> = <span>3 + 3·8/8</span> × <span>1 + 1·15/15</span> = <span>27/8</span> × <span>16/15</span> = <span>27·16/8·15</span> = <span>432/120</span> = <span><span>18·24/</span><span>5·24</span></span> = <span>18/5</span> = <span>3 + 3·55</span> = 3(целых)<span>3/5</span> = 3.6
8+7+4+4=25 частей,т.е. 25х 7-4 =3части =3х=183 х=183/3=61,
25*61=1525
800-(123*6)=62
1) 123*6=738.
2) 800-738=62