Silvio completed this addition problem. Why did Silvio place a number above the 1 in 142?
142
+93
235
The sum of 4 tens and 9 tens is 13 tens, which is
regrouped as 1 hundred and 3 tens.
Ninety-three rounded to the nearest hundred is 1
hundred.
One hundred forty-two rounded to the nearest
hundred is 1 hundred.
The sum of 4 tens and 9 tens is 13 tens, which is
regrouped as 1 ten and 3 hundreds.

step-by-step explanation:

i have done this all on a piece of paper but idk how to put it on here cuz it needs to be drawn

christopher is 272,195 year old

step-by-step explanation:

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870

33/100 is what i got