新北师大版六年级数学下册《 圆柱与圆锥练习一》课件_21.ppt
绿色圃中小学教育网,绿色圃中小学教育网,绿色圃中小学教育网,练习一,复习旧知,圆柱的表面积 =,圆柱的体积 =,侧面积+2个底面积,底面积高, 3.14326.5=,183.69(cm3),100.48(cm3), 856.5=,260(cm3), 444=,64(cm3),350,34,2.3,6500,83,4000,4,3.14(125.63.142)215=,18840(m3),答:这个城堡的体积是18840立方米。,3.1427=,43.96(cm2), 3.14(22)27=,21.98(cm3),答:至少需要43.96cm2的纸, 这个糖果盒的体积是21.98cm3。,40cm=0.4m,60cm=0.6m,3.14(0.42)22=0.2512(cm2),3.140.40.6=0.7536(cm2),(0.2512+0.7536)1000.6=60.288(kg),答:刷100个油桶需要60.288千克油漆。,长方体,正方体,圆柱,(5030+5015+3015)2=,5400(cm2), 556=,150(cm2), 3.14610+3.14(62)2 =,244.92(cm2),答:这时乙容器中的水有4cm。,502010 3.14(202)2 ,32(cm),答:圆柱形钢柱有32cm。,3.14(22)21.5=,4.71(m3),0.628(m3),(4.71+0.628)700=,3736.6(kg),答:这个粮仓最多能装3736.6千克粮食。,都可以用“V=Sh”,16cm,4cm,2.55cm,64cm2,81.67cm3,8cm,8cm,1.27cm,64cm2,40.52cm3,4cm,16cm,0.64cm,64cm2,20.58cm3,2cm,32cm,0.32cm,64cm2,10.29cm3,当侧面积一定时,越是细、长的圆柱体积越小,越是粗、矮的圆柱体积越大。,16cm,4cm,2.55cm,64cm2,81.67cm3,8cm,8cm,1.27cm,64cm2,40.52cm3,4cm,16cm,0.64cm,64cm2,20.58cm3,2cm,32cm,0.32cm,64cm2,10.29cm3,成立,