Excuse me, how to do these math problems in the fifth grade of primary school? And tell me how to solve the problem! thank you - Training Enrollment Network

Excuse me, how to do these math problems in the fifth grade of primary school? And tell me how to solve the problem! thank you

① Solution: The height of the cuboid is (232-56*2)/30=4 (decimeter).

Volume: 56*4=224 (cubic decimeter)

The volume of this cuboid is 224 cubic decimeters.

② Solution: 0.5 m =5 decimeter 5× 5 = 125 (cubic decimeter) = 125 (liter) 125÷(8×5)=3. 125 (decimeter).

Answer: The water depth of the cuboid water tank after pouring water is 3.125m.

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