Evaluate the expression. 1/4 ÷ 1/2 * 2/5 Write your answer as a fraction or as a whole or mixed number. ______

Understand the problem: Understand the problem. We need to calculate the number of rolls of electrical tape an electrician should order given the total length of tape needed and the length of tape on each roll.Identify the given values: Identify the given values. Total amount of electrical tape needed: 8,000 cm Amount of tape on each roll: 2,000 cmDetermine the operation needed: Determine the operation needed to solve the problem. To find the number of rolls needed, we divide the total amount of tape by the amount of tape on each roll. Expression: Total amount of tape needed ÷ Amount of tape on each rollPerform the division: Perform the division to find the number of rolls. 8,000 cm ÷ 2,000 cm = 4 rolls

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Math Problems

Grade 7

Evaluate numerical expressions involving fractions

Full solution

Q. Evaluate the expression.

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\frac{1}{4} \div \frac{1}{2} \times \frac{2}{5}

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Write your answer in simplest form.

Understand the problem: Understand the problem. $\newline$ We need to calculate the number of rolls of electrical tape an electrician should order given the total length of tape needed and the length of tape on each roll.
Identify the given values: Identify the given values. $\newline$ Total amount of electrical tape needed: $8,000\,\text{cm}$ $\newline$ Amount of tape on each roll: $2,000\,\text{cm}$
Determine the operation needed: Determine the operation needed to solve the problem. $\newline$ To find the number of rolls needed, we divide the total amount of tape by the amount of tape on each roll. $\newline$ Expression: $\text{Total amount of tape needed} \div \text{Amount of tape on each roll}$
Perform the division: Perform the division to find the number of rolls. $8,000\,\text{cm} \div 2,000\,\text{cm} = 4$ rolls