7. © assessment ali wrote this first step in
how to add 27 + 12 on a hundred chart.
start at 27 on the chart.
write the other steps.

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.

2.9863 to the 60th power