Estimate each sum to the nearest ten :
`(356+275)`

Answer

To estimate the sum of 356 and 275 to the nearest ten, we will follow these steps:

### Step 1: Round 356 to the nearest ten
- Look at the digit in the ones place of 356, which is 6.
- Since 6 is greater than 5, we round up.
- We add 1 to the tens place (5) and change the ones place (6) to 0.
- Therefore, 356 rounds to **360**.

### Step 2: Round 275 to the nearest ten
- Look at the digit in the ones place of 275, which is 5.
- Since 5 is equal to 5, we also round up.
- We add 1 to the tens place (7) and change the ones place (5) to 0.
- Therefore, 275 rounds to **280**.

### Step 3: Add the rounded numbers
- Now we add the rounded numbers: 360 + 280.
- Start with the ones place: 0 + 0 = 0.
- Next, the tens place: 6 + 8 = 14 (write down 4 and carry over 1).
- Finally, the hundreds place: 3 + 2 + 1 (carry) = 6.
- So, 360 + 280 = **640**.

### Final Answer
The estimated sum of 356 and 275 to the nearest ten is **640**.

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