38 + 25
Sara has thirty-eight stickers. She gets twenty-five more. How many stickers does she have now?
Let's stack thirty-eight and twenty-five so the tens line up with tens and the ones line up with ones.
Each number is made of tens and ones. Thirty-eight is thirty plus eight. Twenty-five is twenty plus five.
Let's start with the ones column. Eight plus five?
Thirteen! Eight and five make a ten and three more, so we write thirteen below the line.
Now the tens column. Thirty plus twenty?
Fifty! Three tens and two tens make five tens. We write fifty below the thirteen.
Now we add our two partial sums together — thirteen plus fifty.
Thirteen plus fifty is sixty-three.
So thirty-eight plus twenty-five is sixty-three. Sara has sixty-three stickers!