Video: Adding Two-Digit Numbers by Breaking Both into Tens and Ones

We can break apart numbers into tens and ones to add. 43 + 16. Add the tens. What is 40 + 10? Add the ones. What is 3 + 6? Add the sums to find 43 + 16.

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Video Transcript

We can break apart numbers into tens and ones to Add. 43 plus 16. Add the tens. What is 40 plus 10. Add the ones. What is three plus six?

Add the sums to find 43 plus 16. To help us add 43 and 16, we’ve broken apart these two numbers into their tens and ones. 43 has four tens, which is worth 40. And it has three ones, which are worth three. 16 has a one in the tens place, which is worth 10, and the six digit in 16 is worth six ones. First, we need to add the tens. 40 plus 10. 10 more than 40 or 40 plus 10 is 50. Next, we have to add the ones, three plus six. Three plus six is nine.

Now, we just need to add these two sums together. The total of our tens is 50. And the total of our ones is nine. 50 plus nine equals 59. 43 plus 16 equals 59. First, we broke the numbers apart into tens and ones. We added the tens; 40 plus 10 is 50. Then we added the ones; three plus six is nine. Then all we had to do is add the sums. 50 plus nine is 59 to give us our answer. 43 plus 16 equals 59.

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