Double-Digit Addition Without Regrouping
Welcome to another exciting math lesson! Today, we’re going to learn how to add two double-digit numbers without regrouping. It’s simple, and with a bit of practice, you’ll be solving these problems like a pro in no time!
What is Double-Digit Addition Without Regrouping?
When you add two double-digit numbers, sometimes the sum of the digits in each place value is less than 10. This means there’s no need to carry over numbers to the next place. That’s what we call addition without regrouping.
For example:
23 + 41 = ?
Here, both the ones and tens places add up to less than 10, so we can solve it without regrouping.
How to Solve Step-by-Step
Let’s work through the problem 23 + 41 step by step:
- Step 1: Add the digits in the ones place. In this case:
3 + 1 = 4 - Step 2: Add the digits in the tens place. In this case:
2 + 4 = 6 - Step 3: Combine the sums. Write down the tens digit (6) followed by the ones digit (4). The final answer is:
23 + 41 = 64
Practice Problems
Now it’s your turn to try solving these problems. Remember, there’s no regrouping needed, so just add the digits in each place:
- 32 + 41 = ?
- 54 + 12 = ?
- 21 + 30 = ?
- 42 + 31 = ?
- 50 + 24 = ?
Helpful Tip
To make sure you don’t miss anything, always start by adding the ones place first. Then move to the tens place. This way, your answers will always be accurate!
Why Practice Addition Without Regrouping?
Double-digit addition without regrouping is the foundation for learning more complex addition problems. By mastering this, you’ll be ready for regrouping and even triple-digit problems in no time!
Answers to Practice Problems
Check your work against the answers below:
- 32 + 41 = 73
- 54 + 12 = 66
- 21 + 30 = 51
- 42 + 31 = 73
- 50 + 24 = 74
1) Add these numbers:
| 3 | 5 | |||
| + | 2 | 3 | ||
2) Add these numbers:
| 5 | 3 | |||
| + | 3 | 3 | ||
3) Add these numbers:
| 1 | 0 | |||
| + | 8 | 0 | ||
4) Add these numbers:
| 1 | 1 | |||
| + | 8 | 0 | ||
5) Add these numbers:
| 3 | 5 | |||
| + | 3 | 3 | ||
6) Add these numbers:
| 4 | 0 | |||
| + | 3 | 0 | ||
7) Add these numbers:
| 1 | 7 | |||
| + | 2 | 0 | ||
8) Add these numbers:
| 4 | 0 | |||
| + | 4 | 2 | ||
9) Add these numbers:
| 2 | 0 | |||
| + | 3 | 3 | ||
10) Add these numbers:
| 5 | 3 | |||
| + | 2 | 1 | ||
Answers:
1) 58
2) 86
3) 90
4) 91
5) 68
6) 70
7) 37
8) 82
9) 53
10) 74