Word Problems Involving Decimals
To solve word problems involving decimals, identify the important details. This includes the given facts, what is asked, operation to be use, and number sentence. Solve the problem carefully. Check the answer obtained by reversing the process. Simplify the answer when needed.
Learning Task 3:Answers:
- ₱31.50
- ₱102, ₱306
- 45.6 miles
- ₱3,473, 1,000.5 grams
- ₱17,185.50
Solutions:
1. Asked: The cost of 6 notebooks.
Given: ₱5.25 - cost of a notebook
6 - number of notebooks
Operations: multiplication
Number Sentence: 6(₱5.25) = N
Solution: 6(₱5.25) = N
₱31.50 = N
Answer: Therefore, 6 notebooks cost ₱31.50.
2. Asked: The student's earning for 4 hours.
The student's earning in a week.
Given: ₱25.50 - the student's earning per hour
4 hours - total hours the student has worked
3 days - total days the student has worked
Operations: multiplication
Number Sentence: 4(₱25.50) = N
3[4(₱25.50)] = N
Solution: Find the student's earning after 4 hours.
4(₱25.50) = N
₱102 = N
Find the student's earning in a week.
3[4(₱25.50)] = N
3( ₱102) = N
₱306 = N
Answer: Therefore, the student earns ₱102 in 4 hours and ₱306 in a week.
3. Asked: The distance between the first and second observatory.
Given: 3.8 miles - the distance traveled by Mrs. De Guzman to reach the first observatory
13 times far - the second observatory
6 - number of notebooks
Operations: multiplication, subtraction
Number Sentence: 13(3.8 miles) - 3.8 miles = N
Solution: 13(3.8 miles) - 3.8 miles = N
49.4 miles - 3.8 miles = N
45.6 miles = N
Answer: Therefore, first observatory is 45.6 miles away from the second observatory.
4. Asked: The cost and weight of 115 chocolate bars.
Given: ₱30.2 - cost of each chocolate bar
8.7 grams - weight of each chocolate bar
Operations: multiplication
Number Sentence: 115(₱30.2) = N
115(8.7 grams) = N
Solution: Find the cost of the chocolate bars.
115(₱30.2) = N
₱3,473 = N
Find the weight of the chocolate bars.
115(8.7 grams) = N
1,000.5 grams = N
Answer: Therefore, the chocolate bars cost ₱3,473 and weight 1,000.5 grams.
5. Asked: The cost of 95 kilograms of beef.
Given: ₱180.90 - cost of a kilo of beef
95 - amount of beefs in kilo
Operations: multiplication
Number Sentence: 95(₱180.90) = N
Solution: 95(₱180.90) = N
₱17,185.50 = N
Answer: Therefore, 95 kilos of beef cost ₱17,185.50.
How to solve word problems involving decimals: https://brainly.ph/question/10874012
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