Multiplying by two-and_three digit
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The document provides step-by-step instructions for multiplying two- and three-digit numbers by a one-digit number. It explains that the process involves multiplying the ones place values first, carrying values to the next place if needed, and then multiplying each subsequent place value while accounting for any carried values. Two examples are worked through applying these steps: multiplying 45 by 5 to get 225, and multiplying 364 by 4 to get 1,456.
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Multiplying by two-and_three digit
- 1. Multiplying Two- and Three- Digit Numbers by a One- Digit Number
- 2. Step 1 Think about 3 groups of 24. 24 3x
- 3. 24 3x Step 2 Multiply the ones. Think: 4 x 3 = 12 24 3x
- 4. Step 3 Regroup 12 ones as 1 ten and 2 ones. Write down the ones. Carry the tens. 24 3x 2 1
- 5. 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 24 3x 2 1
- 6. Step 5 Your final answer is 72. 7 24 3x 2 1 Let’s try another problem!
- 7. Step 1 Think about 5 groups of 45. 45 5x
- 8. 45 5x Step 2 Multiply the ones. Think: 5 x 5 = 25 45 5x
- 9. Step 3 Regroup 25 ones as 2 tens and 5 ones. Write down the ones. Carry the tens. 45 5x 5 2
- 10. Step 4 Then multiply the bottom ones times the tens. Add in the two ten you carried over. Think: 20 tens + 2 tens = 22 45 5x 5 2 22
- 11. Step 5 Your final answer is 225. Let’s try a harder problem! 45 5x 5 2 22
- 12. Step 1 Think about 4 groups of 364. 64 4x 3
- 13. Step 2 Multiply the ones. Think: 4 x 4 = 16 64 4x 364 4x 3
- 14. Step 3 Regroup 16 ones as 1 ten and 6 ones. Write down the ones. Carry the tens. 6 1 64 4x 3
- 15. 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 64 4x 3 1
- 16. Step 5 Regroup 25 tens as two hundreds and five tens. Write down the tens. Carry the hundreds. 64 4x 3 6 1 5 2
- 17. 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 64 4x 3 12 5
- 18. Step 7 Your final answer is 1,456. 6 64 4x 3 12 51,4 Now try some on your own!