multiplying two- and three- digit numbers by a one- digit number
TRANSCRIPT
![Page 1: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/1.jpg)
Multiplying Two- and Three- Digit
Numbers by a One- Digit Number
![Page 2: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/2.jpg)
Step 1
Think about 3 groups of 24.
243x
![Page 3: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/3.jpg)
243x
Step 2
Multiply the ones.
Think:4 x 3 = 12
243x
![Page 4: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/4.jpg)
Step 3
Regroup 12 ones as 1 ten and 2 ones. Write down the ones. Carry the tens.
243x2
1
![Page 5: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/5.jpg)
Step 4
Then multiply the bottom ones times the tens. Add in the one ten you carried over.
Think:6 tens + 1 ten = 7 tens
7
243x2
1
![Page 6: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/6.jpg)
Step 5
Your final answer is 72.
7
243x2
1
Let’s try another problem!
![Page 7: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/7.jpg)
Step 1
Think about 5 groups of 45.
455x
![Page 8: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/8.jpg)
455x
Step 2
Multiply the ones.
Think:5 x 5 = 25
455x
![Page 9: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/9.jpg)
Step 3
Regroup 25 ones as 2 tens and 5 ones. Write down the ones. Carry the tens.
455x5
2
![Page 10: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/10.jpg)
Step 4
Then multiply the bottom ones times the tens. Add in the two ten you carried over.
Think:20 tens + 2 tens = 22
455x5
2
22
![Page 11: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/11.jpg)
Step 5
Your final answer is 225.
Let’s try a harder problem!
455x5
2
22
![Page 12: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/12.jpg)
Step 1
Think about 4 groups of 364.
644x
3
![Page 13: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/13.jpg)
Step 2
Multiply the ones.
Think:4 x 4 = 16
644x
3644x
3
![Page 14: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/14.jpg)
Step 3
Regroup 16 ones as 1 ten and 6 ones. Write down the ones. Carry the tens.
6
1
644x
3
![Page 15: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/15.jpg)
Step 4
Then multiply the bottom ones times the tens. Add in the one ten you carried over.
Think:24 tens + 1 ten = 25 tens
6
644x
31
![Page 16: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/16.jpg)
Step 5
Regroup 25 tens as two hundreds and five tens. Write down the tens. Carry the hundreds.
644x
3
6
1
5
2
![Page 17: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/17.jpg)
Step 6
Then multiply the bottom ones times the hundreds. Add in the two hundreds you carried over.
Think:12 hundreds + 2 hundreds = 14
6
644x
312
5
![Page 18: Multiplying Two- and Three- Digit Numbers by a One- Digit Number](https://reader033.vdocuments.net/reader033/viewer/2022061618/551afa0155034606048b651a/html5/thumbnails/18.jpg)
Step 7
Your final answer is 1,456. 6
644x
312
51,4
Now try some on your own!