Adding Big Numbers for Kids: Column Addition with Carrying (Grade 2 Math)

Hi, I'm Luna from DoodleBeez. Today we are adding bigger numbers, like twenty seven plus fifteen. The secret is to line them up and add one column at a time.

First, write the numbers one under the other. Tens under tens, ones under ones. Twenty seven on top, fifteen underneath. Draw a line below.

Now add the ones first. Seven plus five is twelve. Twelve is one ten and two ones. Write the two in the ones column, and carry the one ten over to the tens column.

Now the tens. One carried, plus two, plus one. One plus two plus one is four. Write four in the tens column. Twenty seven plus fifteen equals forty two.

Let's do one more. Thirty four plus twenty three. Line up. Ones first: four plus three is seven. No carry needed. Tens: three plus two is five. Thirty four plus twenty three is fifty seven.

Now it's your turn. Forty eight plus thirty five. Pause and try. Ready? Ones: eight plus five is thirteen, write three, carry one. Tens: one plus four plus three is eight. The answer is eighty three.

Great job! Remember, line up tens and ones, add the ones first, and if they make ten or more, carry one ten. Practice big sums in the Math Lab at doodlebeez.com. See you next time!