Calculate Daily Meals: Solving 3 × 17 Multiplication Problem

Q: How do I know when to multiply instead of add?

Look for repeated amounts over time! If someone does the same thing every day for multiple days, you multiply. Adding only works for one-time events.

Q: What if the number of meals changes each day?

If meals vary daily, you'd need to add each day's meals instead. But when it says "every day", the amount stays constant, so multiply!

Q: Can I solve this problem differently?

Yes! You could use repeated addition: 3+3+3... (17 times). But multiplication is much faster and less error-prone for larger numbers.

Q: How do I check if 51 meals makes sense?

Think about it: 3 meals per day for over two weeks should be around 40-60 meals. Since $ 51 $ falls in this range, it's reasonable!

Q: What if I forgot how to multiply 3 × 17?

Break it down! $ 3 \times 17 = 3 \times (10 + 7) = 30 + 21 = 51 $. You can also use skip counting by 3s seventeen times.

Multiplication Word Problems with Daily Routines

Daniel prepares 3 meals every day.

How many meals does Daniel prepare in 17 days?

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations

00:00 How many meals does Danny prepare for 17 days?

00:03 Given: number of meals per day, number of days

00:08 We will use long multiplication to calculate

00:12 We will solve each multiplication separately and then substitute in the long multiplication

00:29 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution

Understand the problem

Daniel prepares 3 meals every day.

How many meals does Daniel prepare in 17 days?

Step-by-step solution

To solve this problem, we'll follow these steps:

Step 1: Identify the number of meals Daniel prepares per day, which is given as 3.
Step 2: Identify the total number of days, which is given as 17.
Step 3: Multiply the number of meals per day by the number of days to find the total meals.

Now, let's work through each step:
Step 1: Daniel prepares $3$ meals per day.
Step 2: We are considering a total of $17$ days.
Step 3: Calculate the total number of meals by multiplying:
$\text{Total meals} = 3 \times 17$

Carrying out the multiplication:
$3 \times 17 = 51$

Therefore, Daniel prepares a total of $51$ meals over 17 days.

Final Answer

$51$

Key Points to Remember

Essential concepts to master this topic

Rule: Identify items per day and number of days
Technique: Multiply directly: 3 meals/day × 17 days = 51 meals
Check: Divide answer by days: 51 ÷ 17 = 3 meals/day ✓

Common Mistakes

Avoid these frequent errors

Adding instead of multiplying
Don't add 3 + 17 = 20 meals! This only gives you meals for two days, not seventeen days. Always multiply when finding totals across multiple time periods.

Practice Quiz

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FAQ

Everything you need to know about this question

How do I know when to multiply instead of add?

Look for repeated amounts over time! If someone does the same thing every day for multiple days, you multiply. Adding only works for one-time events.

What if the number of meals changes each day?

If meals vary daily, you'd need to add each day's meals instead. But when it says "every day", the amount stays constant, so multiply!

Can I solve this problem differently?

Yes! You could use repeated addition: 3+3+3... (17 times). But multiplication is much faster and less error-prone for larger numbers.

How do I check if 51 meals makes sense?

Think about it: 3 meals per day for over two weeks should be around 40-60 meals. Since $51$ falls in this range, it's reasonable!

What if I forgot how to multiply 3 × 17?

Break it down! $3 \times 17 = 3 \times (10 + 7) = 30 + 21 = 51$ . You can also use skip counting by 3s seventeen times.

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