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# Subtracting integers: find the missing value

Use number lines to find missing numbers in subtraction equations with integers. Arrows to the left equivalently mean adding a negative number and subtracting a positive number of the same magnitude. Arrows to the right equivalently mean adding a positive number and subtracting a negative number of the same magnitude. Created by Sal Khan.

## Want to join the conversation?

• -+-=-
-x-=+
why is this?
• You visualize it by taking a look at a number line. For the first example, say we start with -5 and then we add another -5. We would continue to move in the negative direction, therefore leaving us with a negative number, -10. For the second example, a negative times a negative will be a positive because the negatives cancel each other out.
• i kinda understand this
• Little to long khan academy. Rather practice than watch.
• Is anyone else confused on this?
• yes sirry
• how much wood would a wood chuck chuck if a wood chuck could chuck wood?
(1 vote)
• the person below me nukes ukraine !!
(1 vote)
• can we imagine the missing number as x and then solve for x? Is that the point of this lesson?
(1 vote)
• imagine having to draw a number line every time to find the answer...