r ` > = - Wj.\r12 6 ----- - 2-\r?\n2+ 2 = 2 ?r`\r6 12\r1\r1 + 2 = 2 ?Wj\rpqWjk2 r`#k 1r`>=1Wj.\r\n?2, I\r? 3 6 @ A 3 7 @.\r9 7 . "(tuv -wxy#u 1 z [ , u 2 Z [ , u 1 {[h\r?\n"tu4 wxy#1z[#2 Z[#1{[h\r\n?4, 1, 2, 1h\r98 . -}~#3?2 , 15c
#S 4 . 5 .\r?\n15P`=1.5*`\r3X1.5=4.5 ?0@*`\rS4.50@*`.\r\n?4.5.\r99 . R-1E?1U57 y#qy3 ”#4 yA , u 6 y.\r1 4 6\r?\nR-11U57 y#qy-E?#4 yA-!-u6\r7 7 7\ryh\r1 4\r\n?/,\#6o\r7 7\r10\r100. = 12 4-30=2? 5 = 40 % = 0.4 ?WB\r10\r?\n- = 12+30=2? 5=40%=0.4.\r25\r\n?25, 12, 40, 0.4.\r? 3 7 @ A 3 7 @