Sure! Let’s solve each problem step by step and explain the reasoning clearly.
---
Problem 1:
*A flashlight requires 2 batteries to function. How many batteries in all would 7 such flashlights require?*
✔ Solution:
Each flashlight needs 2 batteries.
For 7 flashlights:
7 × 2 = 14 batteries
📌 *Explanation:* This is a simple multiplication problem — you multiply the number of flashlights by the number of batteries each one needs.
---
Problem 2:
*A CD contains 4 music tracks. How many music tracks would 8 such CDs contain?*
✔ Solution:
Each CD has 4 tracks.
For 8 CDs:
8 × 4 = 32 tracks
📌 *Explanation:* Multiply the number of CDs by the number of tracks per CD to get the total number of tracks.
---
Problem 3:
*A rectangle is 9 inches long and 4 inches wide. Find the area of the rectangle. (Area of a rectangle = length × width)**
✔ Solution:
Length = 9 inches, Width = 4 inches
Area = 9 × 4 = 36 square inches
📌 *Explanation:* The formula for the area of a rectangle is given. Plug in the values and multiply.
---
Problem 4:
*Wendy uses 6 ounces of butter to bake 9 cookies. How many cookies can she bake with 18 ounces of butter?*
✔ Solution:
First, find out how much butter is needed per cookie:
6 ounces ÷ 9 cookies = 2/3 ounce per cookie
Now, with 18 ounces of butter:
18 ÷ (2/3) = 18 × (3/2) = 27 cookies
OR — use proportion:
If 6 oz → 9 cookies
Then 18 oz → ? cookies
Notice that 18 is
3 times 6, so she can bake
3 times as many cookies:
9 × 3 = 27 cookies
📌 *Explanation:* This is a proportional reasoning problem. You can either find the unit rate (butter per cookie) or scale up proportionally since 18 is a multiple of 6.
---
Problem 5:
*A small train tour operator owns a fleet of 8 cars of the same make. Each car is filled with 7 liters of engine oil. How many liters in all have been filled in the cars?*
✔ Solution:
Each car gets 7 liters.
For 8 cars:
8 × 7 = 56 liters
📌 *Explanation:* Multiply the number of cars by the amount of oil per car to get the total oil used.
---
##
✔ Final Answers:
1.
14 batteries
2.
32 music tracks
3.
36 square inches
4.
27 cookies
5.
56 liters
Let me know if you’d like these explained visually or with diagrams!
Parent Tip: Review the logic above to help your child master the concept of multiplication word problems worksheet 4th.
