What arithmetic operation determines how many top rail pieces are required from total length and piece length?

What arithmetic operation determines how many top rail pieces are required from total length and piece length?

• A. Addition
• B. Subtraction
• C. Division
• D. Multiplication

Answer: (C)

Determining how many top rail pieces you need is about how many equal-length portions fit into the total length. Each piece adds a fixed length, so you divide the total length by the length of one piece to see how many pieces are required. If the division isn’t a whole number, you round up because you can’t use a fraction of a piece—you’ll need one more full piece to cover the remaining length. For example, total length 115 inches with each piece 18 inches long gives 115 ÷ 18 = 6.388, so you’d need 7 pieces. Addition would just add counts, multiplication would scale a count to reach the total, and subtraction would find a remaining difference; division directly answers how many pieces fit into the total.

Determining how many top rail pieces you need is about how many equal-length portions fit into the total length. Each piece adds a fixed length, so you divide the total length by the length of one piece to see how many pieces are required. If the division isn’t a whole number, you round up because you can’t use a fraction of a piece—you’ll need one more full piece to cover the remaining length. For example, total length 115 inches with each piece 18 inches long gives 115 ÷ 18 = 6.388, so you’d need 7 pieces. Addition would just add counts, multiplication would scale a count to reach the total, and subtraction would find a remaining difference; division directly answers how many pieces fit into the total.