Silvio completed this addition problem.

Question

142
+93
235
Why did Silvio place a number above the 1 in 142?
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(1 point)
• 93 rounded to the nearest hundred is 1 hundred.
Tundred or 4 tens and 9 tens is 13 tens, which is regrouped as 1 ten and 3
The sum of 4 tens and 9 tens is 13 tens, which is regrouped as 1 hundred and 3
• 142 rounded to the nearest hundred is 1

Answer 1

Silvio placed a number above the 1 in 142 because when he was adding the numbers together, he needed to regroup (carry) because the sum of the digits in the "tens" column exceeded 10.

Here's how it works:

1. When adding the numbers, we start with the ones column:

   • 2 (from 142) + 3 (from 93) = 5

2. Next, we move to the tens column:

   • 4 (from 142) + 9 (from 93) = 13. Since 13 is greater than 10, we write down the 3 and carry over 1 to the hundreds column.

3. Finally, in the hundreds column:

   • 1 (from 142) + 0 (from 93) + 1 (the carry) = 2.

This process leads to the final answer of 235. The reason for placing a number above the 1 in 142 is to indicate that he had to carry over 1 because the tens column exceeded 10.