Question Video: Understanding the Relationship between Addition and Subtraction Equation | Nagwa Question Video: Understanding the Relationship between Addition and Subtraction Equation | Nagwa

# Question Video: Understanding the Relationship between Addition and Subtraction Equation Mathematics

What is the number that can fill in the empty places? 37 − 19 = ＿. ＿ + 19 = 37

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### Video Transcript

What is the number that can fill in the empty places? 37 take away 19 equals what. What plus 19 equals 37.

Let’s start by calculating 37 take away 19. Let’s start in the ones place. We have seven ones, and we need to take away nine. We don’t have enough ones. We’ve taken a 10 and added it to the ones column. Now, we have 17 ones take away nine ones, which is eight. And in the tens column, we have two 10s and we need to subtract one. Two take away one is one. So, we know that 37 subtract 19 equals 18. So, the missing number in our addition calculation must be 18. If the whole amount is 37 — this is the number we started with — we know the missing part is 18 and the other part which we were already given is 19. If the whole amount is 37 and the two parts are 18 and 19, we know that 18 plus 19 equals 37. The number that can fill in the empty places is number 18. 37 subtract 19 is 18. 18 plus 19 equals 37.

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