3 4 4 5 50 51 1 1\r2X( 1 - 1\r= — - 5\r2 1 ).\r2-2-4\r=49 M\r51\r2 I =\r3- X\r ? 0 1 P`0 5 ?\r 4 +9? x4*2 - 3.14X42 X 1 ,\r4\r=13x4+2 - 3.14°4,\r=26 - 12.56,\r= 13.44 ;<=>?@\r24-1&A BCDEFGHI13.44;<J>\r P 0 5 P`0 30??.\rIS :10x5-46+5 -3 \r=4+2\r=256\r10 - 2=856\r257 7 89:;85 <:;=25.\r? : 200+2=700 ( )\r700x(1 - 40%)=420 ( @ )420 T =180 ( @ )\r26-17:BCDE180 .\rF 2 Gin >10 4 /I\r7 8JK<LMNO10kmPQRS.\r27-1\r7 8JT<LUNO2 kmPQVS.\r27-2 4 50\r28-1110%-1=10%\r* 8XYZ[f\ ,]^_`a\r37x1000+50+25=29.6 b c 6\rd \ ,]^efg?\r35-29.6 = 5.4hc6\rY Z i *j ]^kS\r5.4-5 = 0.4 l 6\r011mna\r50x25x0.4 = 500 opqhc6\r29-1r 8J s t **u v 500pqwc.
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