Number sense : would the answer to 20 x 500 have three zeros or four zeros? explain.

20=2*10
500=5*10*10

20*500=
2*10*5*10*10=
2*5*10*10*10=
10*10*10*10=
10000
4 zeroes

500 * 20= 10000
So they would have 4 zeros.
-thepopularoneha

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

Yeah she/ he needs look how long that is man