Estimate each sum to the nearest ten :
`(77+63)`

Answer

To estimate the sum of \(77 + 63\) to the nearest ten, we will follow these steps:

### Step 1: Round 77 to the nearest ten
- Look at the units digit of 77, which is 7.
- Since 7 is greater than 5, we round up.
- Therefore, 77 rounds to 80.

### Step 2: Round 63 to the nearest ten
- Look at the units digit of 63, which is 3.
- Since 3 is less than 5, we round down.
- Therefore, 63 rounds to 60.

### Step 3: Add the rounded numbers
- Now we add the rounded values: \(80 + 60\).
- Performing the addition:
- \(0 + 0 = 0\)
- \(8 + 6 = 14\)
- So, \(80 + 60 = 140\).

### Final Answer
The estimated sum of \(77 + 63\) to the nearest ten is **140**.

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