Predict the result
Find the midpoint of negative four and ten.
Predict the number halfway between them on the number line.

Set up the model
Add the two numbers, then divide the sum by two.
The model is negative four plus ten, all divided by two.

Work the example
Negative four plus ten equals six.
Divide six by two to get three.
The midpoint of negative four and ten is three.

Check the result
Try the same-lesson check: find the midpoint of negative six and eight.
Add the signed numbers, then divide the sum by two. Take eight seconds to think.
[Eight-second silent pause to work; the answer remains hidden.]
Negative six plus eight equals two. Two divided by two equals one.
The midpoint of negative six and eight is one.

Interpret the result
The midpoint is the same distance from both endpoints.
Three minus negative four equals seven. Ten minus three also equals seven.
Three lies between negative four and ten, seven units from each endpoint.