4: 1.5÷2=0.75(厘米)
3.14x0.75×6÷9
=3.14×0.5625×6÷9
=1.1775
≈1 (立方厘米)
答:每粒糖的体积大约是1立方厘米。5: ⑴ 40cm=4dm 50cm=5dm
4÷2=2dm
3.14×2×5
=3.14×4×5
=62.8(升)
答:这个油桶的容积是62.8升。⑵ 62.8×0.85=53.38(千克)
答:这个油桶可装汽油53.38千克。6: 9÷2=4.5(厘米)
8x9x10-3.14x4.5x8
=8x9x10-3.14x20.25x8
=720-508.68
=211.32(立方厘米)
答:削去的体积是211.32立方厘米。[本页感谢小七以及qq为787793814网友纠错]