My 3rd grader brought home a math worksheet and I'm not sure about the answers, so I wanted another opinion.

Estimate each sun or difference by rounding.

23
+ 71

so, do you answer the prblem and then write the rounded numbers to the right or do you just round the answer?

I would write the answer, then = and write the rounded number. You don't say what you want them rounded to but we will check two or three if you would like.

Thanks.

To estimate the sum or difference by rounding, you can follow these steps:

1. Look at the place value you want to round to. For example, if you want to round to the nearest ten, look at the tens place.

2. Identify the digit in the place value you want to round to. In this case, look at the digit in the tens place.

3. Look at the digit to the right of the place value you're rounding to. If it's 5 or greater, you will round up. If it's less than 5, you will round down.

Now, let's apply these steps to the given problem.

You have the problem: 23 + 71

To estimate the sum, you can round each number to the nearest ten and then add them together.

For 23, the tens digit is 2, and the one's digit is 3. The digit to the right of the tens place is 3, which is less than 5. Therefore, you round down to the nearest ten, which is 20.

For 71, the tens digit is 7, and the one's digit is 1. The digit to the right of the tens place is 1, which is less than 5. Therefore, you round down to the nearest ten, which is 70.

Now, add the rounded numbers together: 20 + 70 = 90

So, the estimated sum of 23 + 71 is 90. You can write this as follows:

23 + 71 = 90 (rounded to the nearest ten)

If you want to check the estimate with different rounding, you can follow the same steps but choose a different place value to round to, such as the nearest hundred or nearest thousand.