Question Video: Writing Number Sentences Describing Counting Back on a Number Line | Nagwa Question Video: Writing Number Sentences Describing Counting Back on a Number Line | Nagwa

# Question Video: Writing Number Sentences Describing Counting Back on a Number Line Mathematics • Second Year of Primary School

Find the number sentence that matches this number line.

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### Video Transcript

Find the number sentence that matches this number line.

Looking at this number line, we recognise that we’re starting at nine and ending at two. Going from nine to two is a difference of seven. We’ve moved to the left seven spaces.

Our number sentence will have a few parts. When we move to the left on a number line, that represents subtraction in a number sentence. We can fill in subtraction for our number sentence. We can also add an equal sign to our number sentence.

The first box in our number sentence needs to be the amount that we started with. What did we start with here? We started with nine. And then we subtracted some number. We moved to the left some amount. We subtracted seven. We moved to the left seven spaces.

And finally, we want to know what happens when you start at nine and take seven away. How many are you left with? Two. Nine minus seven equals two. The number sentence that matches the number line is nine minus seven equals two.

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