Learning Task 3: Solve the given problems. Write your answers in your IN CALL notebook. 1. If a notebook costs p 5.25, how much is the cost of 6 notebooks? 2. A working student earns 25.50 per hour. How much does he earn in 4 hours? If he works 3 days a week, how much does he earn in a week? 3. Mrs. De Guzman's class travelled 3.8 miles to the first observatory. The next closest observatory is 13 times far. How far is the second observatory to the first? 4. A chocolate bar weighs 8.7 grams. Find the cost and the weight of 115 coca cola
bars if each bar costs 30.2. 5. A kilogram of beef costs Ⓡ 180.90. How much do 95 kilograms of beef cast?
bars if each bar costs 30.2. 5. A kilogram of beef costs Ⓡ 180.90. How much do 95 kilograms of beef cast?
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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:
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: brainly.ph/question/10874012
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Answer:
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