🏗️ you are to a . You at the ! In , when we add or big , we them on top of each other and from the — the , then , then . This is called the , and it is the use every day.
have : (H), (T), and (O). For , in 346, the 3 is in the , the 4 is in the , and the 6 is in the .
Let's add 265 + 148 using . the so that H up with H, T up with T, and O up with O. in the : 5 + 8 = 13. We fit 13 in one box, so we the 3 in the and the 1 ten over to the . This is called an — like ten for one 10p .
| Step | Column | Calculation | Write | Carry |
|---|---|---|---|---|
| 1 | Ones (O) | 5 + 8 = 13 | 3 | carry 1 to T |
| 2 | Tens (T) | 6 + 4 + 1 carried = 11 | 1 | carry 1 to H |
| 3 | Hundreds (H) | 2 + 1 + 1 carried = 4 | 4 | none |
| Answer | — | — | 413 | — |
up your before you . If a is , a as a so . = ! ✏️
🧩 Put the steps for column addition in the correct order. Drag them into place! ➕
- Read the answer from hundreds to ones
- Add the hundreds column, including any carried digit
- Add the tens column, including any carried digit
- If the total is 10 or more, write the ones digit and carry the ten
- Add the ones column first
- Write the two numbers so H, T and O columns line up
Now for ! Let's try 524 − 267. of the top as your — you are . in the : 4 − 7 is because 4 is than 7. So we a ten from the . The 4 14, and we pay that ten by the by 1. This is also called .
| Step | Column | Calculation | Write | Exchange? |
|---|---|---|---|---|
| 1 | Ones (O) | 4 − 7: borrow 1 ten → 14 − 7 = 7 | 7 | Yes — tens becomes 1 |
| 2 | Tens (T) | 1 − 6: borrow 1 hundred → 11 − 6 = 5 | 5 | Yes — hundreds becomes 4 |
| 3 | Hundreds (H) | 4 − 2 = 2 | 2 | No |
| Answer | — | — | 257 | — |
your by using the () . If 524 − 267 = 257, then 257 + 267 should 524. Add them to see if you get the top ! 🔄
✍️ Complete the column subtraction fact. Fill in the missing numbers! 🔢
When we 743 − 385, the 13 − 5 = , the (after ) 13 − 8 = , and the 6 − 3 = , so the is .
Before you , your by each to the 100. For 265 + 148, to 300 + 100 = 400. Our was 413 — that is to 400, so it is ! is like you are in the before you for the . 🏠
🔗 Match each calculation to its best estimate. Round each number to the nearest 100 first! 🎯
312 + 489
756 − 248
431 + 275
623 − 187
out for such as 3__4 + 2_1 = 615. by and use the to the . Do not — be ! 🔍
Quiz time! 📝
Column Addition and Subtraction — Check Your Skills! ✅
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