Question

Quiz 1 Write an addition equation or a subtraction equation (your choice!) to describe the diagram. _15 10 -5 0 5 Report a prob

Answer 1

Each arrow represents a subtraction. The beginning of the arrow is the number where the subtraction should start and the point of the arrow is the point where the subtraction should end. The first arrow begins in "0" and ends in "-4", while the second arrow begins on the point of the second one and ends in "-13".

We should first represent the arrow number 1, which is shown below:

`0\text{ -4}`

Because the arrow starts at 0 and go "4" units to the left, therefore we need to subtract 4.

The second arrow starts from the first and goes 9 units to the left, so we have:

`(0\text{ - 4) - 9}`