Question

(8см× 3мм×9)+4дм 5см

Answer 1

(80мм*3мм*9)+450 мм= 2160 мм+450 мм= 2610мм= 261 см= 2 дм 61 см.

Answer 2

To solve this expression, we'll first convert all measurements to a consistent unit, such as centimeters, and then perform the calculation:

1. Convert 3 mm to centimeters: $3 \, \text{mm} = 0.3 \, \text{cm}$.
2. Convert 4 decimeters and 5 centimeters to centimeters: $4 \, \text{dm} \, 5 \, \text{cm} = (4 \times 10 \, \text{cm}) + 5 \, \text{cm} = 45 \, \text{cm}$.

Now we have the expression in centimeters: $8 \, \text{cm} \times 0.3 \, \text{cm} \times 9 \, \text{cm} + 45 \, \text{cm}$.

Now, let's calculate the result step by step:

$8 \, \text{cm} \times 0.3 \, \text{cm} \times 9 \, \text{cm} = 21.6 \, \text{cm}^3$ (cubic centimeters)

Adding $45 \, \text{cm}$ (from $4 \, \text{dm} \, 5 \, \text{cm}$):

$21.6 \, \text{cm}^3 + 45 \, \text{cm} = 66.6 \, \text{cm}$

So, the final result is $66.6 \, \text{cm}$.