Question Video: Taking Away Nothing and Identifying the Related Subtraction Sentence | Nagwa Question Video: Taking Away Nothing and Identifying the Related Subtraction Sentence | Nagwa

Question Video: Taking Away Nothing and Identifying the Related Subtraction Sentence Mathematics • First Year of Primary School

There are 5 apples, and none of them has been eaten. How many apples are left? Write the equation that explains this situation.

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Video Transcript

There are five apples, and none of them has been eaten. How many apples are left? Write the equation that explains this situation.

We begin this problem with five apples. In fact, we can see a picture of our five apples underneath. The next piece of information we’re told is that none of the apples has been eaten. And this word “none” is really important. It represents a number. And that number is zero. Zero apples have been eaten. Our first question asks us, how many apples are left? If we’ve eaten none of them, we know that all of them are going to be left. And we can see in the picture this isn’t a picture before; this is a picture afterwards. Yes, we started with five apples. But because none of them have been eaten, we’ve ended with five apples too. And so we can say the number of apples that are left is five.

In the next part of the problem, we’re asked to write the equation or the number sentence that explains the situation. What number shall we start with in our number sentence? Well, we know that there were five apples to begin with. So we’ll start with the number five. Because this is to do with eating apples, it’s going to be a take-away number sentence or a subtraction. Now, what number are we going to subtract? How many apples were eaten? None of the apples were eaten. So we can put a zero there. This is all about subtracting zero from a number.

And what happens when we subtract zero from a number? Well, as we’ve said already, when we take away zero, we’re left with all. The number that we started with doesn’t change. And we can see that we’re left with five apples still. The equation that explains the situation is five take away zero equals five.

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