1
142
+93
------
235
Why did silvio place a number above the 1 in 142?
A. 142 rounded to the nearest hundred is 1 hundred.
B. The sum of 4 tens and 9 tens is 13 tens, which is regrouped as 1 hundred and 3 tens.
C. 93 rounded to the nearest hundred is 1 hundred.
D. The sum of 4 tens and 9 tens is 13 tens, which is regrouped as 1 ten and 3 hundreds.
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Silvio placed a number above the 1 in 142 because he was regrouping during the addition process. Specifically, the correct reason is:
B. The sum of 4 tens and 9 tens is 13 tens, which is regrouped as 1 hundred and 3 tens.
This explains why Silvio wrote a 1 above the 1 in 142; it indicates that he carried over 1 hundred from the addition of the tens column.
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