Let's practice multiplying by two-or-more-digit numbers. For this activity, you will use a thick book like an encyclopedia or a dictionary, a piece of paper, and a pencil. Get the book and open it to a random page. Look at the right page and copy the page number. Write down the number on the piece of paper. Be sure that the number has two digits. If you find a page with only one digit or three digits, try opening another page until you find a two-digit number. Next, choose another page for your second number. This time look for a three-digit page number. You should have a two-digit number and a three-digit number on your piece of paper.
For example, you chose pages 169 and 85. Make a multiplication problem using these page numbers. Write it on the paper. For these numbers, our multiplication problem will be:
Then we solve this problem. Remember, when we work with multiplication problems that have two or more digits, we work one step at a time.
First, we work the ones place (ones column). So 9 times 5 equals 45. We write the 5 and regroup (carry) the 4. Place the 4 on top of the 6 in the tens place. It will look like this:
Then we multiply 6 times 5. Add the 4 we regrouped. We get 34. Write the 4 and regroup the 3. Then solve 1 times 5. Add the 3 we regrouped and write the answer. It will look like this:
Now we multiply by 8. But before we do that, we have to cross out the regrouped numbers from our first problem. We also have to add a 0 to the ones place to start our second answer. Afterward, we multiply, carry, and write the answers. Lastly, we add to get the answer.
Afterward, we multiply, carry, and write the answers. Lastly, we add to get the answer.
Now it's your turn to get other sets of numbers and make a multiplication problem. Continue turning the book's pages and solve your own multiplication problems. Enjoy!
Ready to move on to the next lesson?
Two Digit Numbers Multiplied by Two Digit Numbers Review
