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Question Video: Checking the Answer to a Subtraction Problem by Using Addition Mathematics • 2nd Grade

There are 58 trees in the street. 14 trees are being cut down. How many trees will be left in the street? Hint: After you subtract, check your answer by adding.

02:48

Video Transcript

There are 58 trees in the street. 14 trees are being cut down. How many trees will be left in the street? Hint: After you subtract, check your answer by adding.

We’re being told to subtract and then check our answer by adding. Let’s start by subtracting. We know that there are 58 trees in the street. And we already know we have to subtract. We need to subtract 14 because 14 trees are going to be cut down. Let’s start by subtracting in the ones column. We’ve got eight ones and we need to subtract four. Eight take away four is four. Now, let’s subtract in the tens column. Five 10s take away one 10 is also four. So, we know that there will be 44 trees left in the street.

Now, we have to check our answer by adding. We know the whole amount or the amount of trees that we started with was 58. We also know that 14 trees were being cut down, and there were 44 trees left. So, we can check our subtraction by adding together the two parts, 14 and 44. And we’re checking to see if they make the whole amount, which is 58. So, let’s check our answer by adding 14 and 44. Four ones plus four ones is eight. One 10 and four 10s is five. 14 plus 44 is 58.

We know our subtraction calculation is correct. We’ve checked it by adding. If there are 58 trees in the street, 14 are cut down, there will be 44 trees left. First, we subtracted 14 from 58 to give us our answer 44. And we checked our answer by adding. 14 and 44 is 58. There will be 44 trees left in the street.

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