5NBT5 Multiply 3 digit by 2 digit Whole Numbers

Front

What is the process of multiplying a 3-digit number by a 2-digit number?

Back

To multiply a 3-digit number by a 2-digit number, you can use the standard algorithm: multiply the 3-digit number by each digit of the 2-digit number, starting from the rightmost digit, and then add the results together.

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How do you calculate the total number of items sold over a period of days?

Back

Multiply the number of items sold per day by the number of days. For example, if 164 gumballs are sold each day for 61 days, the total is 164 x 61.

Front

What is the formula to find the total number of books delivered if you know the number of boxes and books per box?

Back

Total books = Number of boxes x Books per box. For example, if there are 284 boxes and each box has 20 books, then total books = 284 x 20.

Front

How do you convert hours spent into minutes?

Back

To convert hours into minutes, multiply the number of hours by 60. For example, 45 minutes per day for 365 days is calculated as 45 x 365.

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What is the total cost of staying at a hotel for a certain number of nights?

Back

Total cost = Cost per night x Number of nights. For example, if each night costs $249 and you stay for 13 nights, the total cost is $249 x 13.

Front

What is the significance of place value in multiplication?

Back

Place value helps in understanding the value of each digit in a number, which is crucial when multiplying multi-digit numbers.

Front

What is the standard algorithm for multiplication?

Back

The standard algorithm involves writing the numbers vertically and multiplying each digit of the bottom number by each digit of the top number, then adding the results.

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How do you check your multiplication answer?

Back

You can check your multiplication answer by using the inverse operation, which is division. Divide the product by one of the factors to see if you get the other factor.

Front

What is an example of a word problem involving multiplication?

Back

If a factory produces 284 boxes of books with 20 books in each box, how many books are produced in total? This is solved by multiplying 284 by 20.

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What is the importance of estimating products in multiplication?

Back

Estimating products helps to quickly assess if the final answer is reasonable and can help catch errors in calculations.