12$0.9×5×0.8 =$ $5×14×0.4 =$
$15×4×0.6 =$ $3.6×4×10 =$
$7×0.3×0.8 =$ $40×0.2×25 =$
$50×6×0.2 =$ $3.6×5×0.7 =$
$80×0.5×100 =$ $7×0.3×0.5 =$
$0.25×40×6 =$ $2.6×5×12 =$
$0.125×80×7 =$ $6×7×50 =$
$20×20×20 =$ $12×30×6 =$
$6×30×10 =$ $5.4×2×3 =$
$3.2×4×10 =$ $0.6×5×0.3 =$
$50×50×50 =$ $2.9×3×0.6 =$
$4×4×4 =$ $0.1×0.1×0.1 =$
$0.3×0.3×0.3 =$ $10×10×10 =$
$40×40×40 =$ $0.8×0.8×0.8 =$

3.6,28,36,144,1.68,200,60,12.6,4000,1.05,60,156,70,2100,8000,2160,1800,32.4,128,0.9,125000,5.22,64,0.001,0.027,1000,64000,0.512

$0.9×5×0.8 = 0.9×(5×0.8) = 0.9×4 = 3.6$；
$5×14×0.4 = 5×0.4×14 = 2×14 = 28$；
$15×4×0.6 = 60×0.6 = 36$；
$3.6×4×10 = 14.4×10 = 144$；
$7×0.3×0.8 = 2.1×0.8 = 1.68$；
$40×0.2×25 = 40×25×0.2 = 1000×0.2 = 200$；
$50×6×0.2 = 300×0.2 = 60$；
$3.6×5×0.7 = 18×0.7 = 12.6$；
$80×0.5×100 = 40×100 = 4000$；
$7×0.3×0.5 = 2.1×0.5 = 1.05$；
$0.25×40×6 = 10×6 = 60$；
$2.6×5×12 = 13×12 = 156$；
$0.125×80×7 = 10×7 = 70$；
$6×7×50 = 42×50 = 2100$；
$20×20×20 = 400×20 = 8000$；
$12×30×6 = 360×6 = 2160$；
$6×30×10 = 180×10 = 1800$；
$5.4×2×3 = 10.8×3 = 32.4$；
$3.2×4×10 = 12.8×10 = 128$；
$0.6×5×0.3 = 3×0.3 = 0.9$；
$50×50×50 = 2500×50 = 125000$；
$2.9×3×0.6 = 8.7×0.6 = 5.22$；
$4×4×4 = 16×4 = 64$；
$0.1×0.1×0.1 = 0.01×0.1 = 0.001$；
$0.3×0.3×0.3 = 0.09×0.3 = 0.027$；
$10×10×10 = 100×10 = 1000$；
$40×40×40 = 1600×40 = 64000$；
$0.8×0.8×0.8 = 0.64×0.8 = 0.512$

下面每个小正方体体积为 1 立方厘米，圈出体积超过 3 立方厘米的立体图形

第一、三、四、六、八个图形

每个小正方体体积为1立方厘米，立体图形体积等于小正方体个数。第一个图形有4个小正方体（底层3个，上层1个），体积4立方厘米；第二个图形有3个小正方体（底层2个，上层1个），体积3立方厘米；第三个图形有5个小正方体（底层4个，上层1个），体积5立方厘米；第四个图形有4个小正方体，体积4立方厘米；第五个图形有3个小正方体，体积3立方厘米；第六个图形有4个小正方体（底层3个，上层1个），体积4立方厘米；第七个图形有3个小正方体（底层2个，上层1个），体积3立方厘米；第八个图形有4个小正方体（底层3个，上层1个），体积4立方厘米。体积超过3立方厘米的是第一、三、四、六、八个图形。