Hình hộp chữ nhật | (1) | (2) | (3) | (4) | (5) |
Chiều dài | 5m | 2/3m | 2,5dm | 7cm | 8cm |
Chiều rộng | 3m | 1/3m | 1,5dm | 5cm | 5cm |
Chiều cao | 4m | 1/4m | 0,5dm | 3cm | 4cm |
P đáy | \(\left(5+3\right)\times2=8\times2=16\left(m\right)\) | 2m | 8dm | \(\left(7+5\right)\times2=12\times2=24\left(\operatorname{cm}\right)\) | 26cm |
Sxq | \(16\times4=64\left(m^2\right)\) | \(2\times\frac14=\frac12\left(m^2\right)\) | \(8\times0,5=4\left(dm^2\right)\) | \(24\times3=72\left(\operatorname{cm}^2\right)\) | \(104\operatorname{cm}^2\) |
S đáy | \(5\times3=15\left(m^2\right)\) | \(\frac23\times\frac13=\frac29\left(m^2\right)\) \(\) | \(2,5\times1,5=3,75\left(dm^2\right)\) | \(35cm^2\) | \(8\times5=40\left(\operatorname{cm}^2\right)\) |
Stp | \(64+2\times15=94\left(m^2\right)\) | \(\frac12+2\times\frac23\times\frac13=\frac12+\frac49=\frac{9+8}{18}=\frac{17}{18}\left(m^2\right)\) | \(4+3,75\times2=4+7,5=11,5\left(m^2\right)\) | \(72+2\times35=72+70=142\left(\operatorname{cm}^2\right)\) | \(104+40\times2=184\left(\operatorname{cm}^2\right)\) |
Thể tích | \(5\times3\times4=60\left(m^3\right)\) | \(\frac23\times\frac13\times\frac14=\frac{2}{9\times4}=\frac{2}{36}=\frac{1}{18}\left(m^3\right)\) | \(2,5\times1,5\times0,5=1,875\left(m^3\right)\) | \(7\times5\times3=105\left(\operatorname{cm}^3\right)\) | \(8\times5\times4=40\times4=160\left(\operatorname{cm}^3\right)\) |
4 và 5
