5 1.C2.13B3.C4.B5.12126 1.ABDC2.21456232145623B3.A4.“”“”“”“”C7 5.CC6.C7.AA8.358 1.BCDA2.A3.D4.B5.2 2 1=321 3 6 =9 B6.33D7.8.8cm6cm6cm6cm213Vr h=23118664 6 128()33cm =23116836 896()33cm =12896128969.“”10 10.2(10 6)x10cm6cm4 4 8()cm+=2(10 6)10cm6cm4 4 8()cm+=2(10 8 10 6 8 6)2(80 60 48)188 2 376x+=+=2cm2376cm11.86 3 18=1812.20cm15cm5cm15cm5cm10cm26cm10cm16cm20 15 5()cm=15 5 10()cm=26 10 16()cm=316 10 5 800()cm=3800cm800 13.11 314.457234567345678456789454758457234567345678456789454758815.n(2)n+2n3n152936
