第九单元总复习第九单元总复习第第2 2课时课时 图形与几何图形与几何90908 83.83.84.54.5850085002626360360363652522 21212 CBABA(0.50.5 8+0.38+0.3 8 8)2 2 1212 4.5=691.24.5=691.2(元)(元)2020 4=54=5(cmcm)5 5 5 5 20=50020=500(cmcm3 3)(9+8.1+6.9)2=12(cm)高:高:12-9=3(cm)宽:)宽:12-8.1=3.9(cm)长:长:12-6.9=5.1(cm)面积:(面积:(3 3.9+3.9 5.1+3 5.1)2=93.78(cm2)6 6 6 6 6 6(1010 8 8)=2.7=2.7(dmdm)1010 8 8(2.7+4.8-62.7+4.8-6)=120=120(dmdm3 3)=120=120(L L)100100 4 4 5=55=5(cmcm)5 5 5 5(5+55+5)=250=250(cmcm3 3)