Find the sum. Hint: add the ones and then the
tens. What happens when there are more
than 10 ones? 54 plus 37.
First, we add the ones: four plus
seven. That makes 11. We can write the one in the ones
column. And we need to carry the 10 across
to the tens column.
Now, we need to add the tens: five
plus three plus the one we carried over. Five plus three is eight and one
more makes nine.
54 plus 37 is 91.