Zhi bought 18 tickets for games at a fair. Each game requires 3 tickets. Zhi wrote the expression 18 – 3g to find the number of tickets she has left after playing g games. Diego correctly wrote another expression, 3(6 – g), that will also find the number of tickets Zhi has left after playing g games.

Use the drop-down menus to explain what each part of Zhi's and Diego's expressions mean.

Zhi's Expression: 18 – 3g
18:

3:

g:

3g:
Diego's Expression: 3(6 – g)
3:

6:

g:

6 – g: