Cancel the zero pairs in the following two sets of tokens. On what floor is the lift attendant in each case? What is the corresponding addition statement in each case?

Question

Bright Tutorials · Accepted Answer

(a) From the picture we see that we can remove three pairs.
This cancels out to 0.
Remaining tokens =
Since two negative tokens is remaining, the lift attendant is on the second floor below the ground floor.
The corresponding addition statement is (+3) + (-5) = (-2)
(b) From the picture we see that we can remove three pairs.
This cancels out to 0.
Remaining tokens =
Since three positive tokens are remaining, the lift attendant is on the third floor above the ground floor.
The corresponding addition statement is (+6) + (-3) = (+3)
10.2 The Token Model Figure it Out (Page No. 258)

The Other Side of Zero — Question 14