There are 54 balls in box A and 79 balls in box B. Estimate the total number of balls in both the boxes taken together.

Answer

To estimate the total number of balls in both boxes A and B, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Number of Balls in Each Box:**
- Box A has 54 balls.
- Box B has 79 balls.

2. **Estimate the Number of Balls in Box A:**
- To estimate 54, we round it to the nearest ten.
- Look at the digit in the ones place, which is 4.
- Since 4 is less than 5, we do not change the tens place.
- Therefore, 54 rounds to **50**.

3. **Estimate the Number of Balls in Box B:**
- To estimate 79, we also round it to the nearest ten.
- Look at the digit in the ones place, which is 9.
- Since 9 is greater than 5, we add 1 to the tens place.
- Therefore, 79 rounds to **80** (7 + 1 = 8, and the ones place becomes 0).

4. **Add the Estimated Values Together:**
- Now, we add the estimated values of Box A and Box B.
- So, we calculate: 50 (from Box A) + 80 (from Box B) = **130**.

5. **Conclusion:**
- The estimated total number of balls in both boxes is **130**.