Representing numbers on the number line
An explorer is searching for treasure: it is $5$ units away from the point $-2$. Which number could it be at? With the number line, this kind of clue can be seen just by looking at a drawing.
Placing integers on the number line
Drag the point and observe how its integer position and its sign change.
Look at the following number line and identify which integer corresponds to each of the letters marked with a dot:
Look at the following number line and identify which integer corresponds to each of the letters marked with a dot:
Draw a number line in your notebook and represent the following integers on it: $+4$, $-3$, $0$, $+1$ and $-5$. Use a distance of $1$ cm between each number.
Draw a number line in your notebook and represent the following integers on it: $+4$, $-3$, $0$, $+1$ and $-5$. Use a distance of $1$ cm between each number.
Distance between two points
The distance between two integers on the number line is the absolute value of their difference: you count how many steps separate one point from the other.
Remember that on the number line, the further to the right a number is, the greater it is. Based on this, use the symbols $>$ (greater than) or $<$ (less than) to…
Remember that on the number line, the further to the right a number is, the greater it is. Based on this, use the symbols $>$ (greater than) or $<$ (less than) to compare these pairs of numbers:
- a) $-4$ _____ $+2$
- b) $-1$ _____ $-5$
- c) $+3$ _____ $0$
- d) $-2$ _____ $+1$
Look at the following number line on which three points, $A$, $B$, and $C$, have been marked. Taking into account the positions of the numbers $0$ and $+2$, identify…
Look at the following number line on which three points, $A$, $B$, and $C$, have been marked. Taking into account the positions of the numbers $0$ and $+2$, identify which integer each letter represents.
The midpoint
The midpoint between two numbers is exactly the same distance from both.
On the number line, the midpoint between two integers is the position that is exactly the same distance from both. Represent the numbers $-6$ and $+2$. Visually find the…
On the number line, the midpoint between two integers is the position that is exactly the same distance from both.
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Represent the numbers $-6$ and $+2$.
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Visually find the midpoint between them and state what number it represents.
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What is the distance (in units) from that midpoint to either of the two endpoints?
Draw a number line and plot the number $-3$ on it. Next, represent: Point $A$, which is the opposite of $-3$. Point $B$, which is $5$ units to the left of $-3$. Point…
Draw a number line and plot the number $-3$ on it. Next, represent:
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Point $A$, which is the opposite of $-3$.
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Point $B$, which is $5$ units to the left of $-3$.
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Point $C$, which is $2$ units to the right of $A$.
Which number does point $C$ represent? Which is the smallest of the four numbers marked on the line?
You can do it on paper and send a photo with your answer.
Points that satisfy a condition
Sometimes you are not given the number directly, but clues about its distance or its absolute value, and you have to find it by looking at the number line.
Draw a number line and represent on it all the integers $x$ that simultaneously satisfy these two conditions: 1. Their absolute value is less than $5$, that is:…
Draw a number line and represent on it all the integers $x$ that simultaneously satisfy these two conditions:
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Their absolute value is less than $5$, that is: $|x| < 5$.
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They are numbers strictly less than $-1$.
You can do it on paper and send a photo with your answer.
Represent the following integers on a number line. Choose a suitable scale (where each mark on the line can represent more than 1 unit) so that they all fit in your…
Represent the following integers on a number line. Choose a suitable scale (where each mark on the line can represent more than 1 unit) so that they all fit in your drawing:
$S = \{ -15, +5, -20, +25, 0, -5 \}$
Back to the beginning: The treasure can be to the right ($-2 + 5 = +3$) or to the left ($-2 - 5 = -7$). So there are two possible positions: $+3$ and $-7$.