## What you’ll learn to do: Simplify and evaluate expressions that involve the addition of integers

In sports, the final score isn’t the only thing that matters. We can also gather stats to measure the performance of individual players or teams. In football, for example, a running back might gain and lose yards throughout the game. If a running back gained [latex]8[/latex] yards, lost [latex]6[/latex] yards, gained [latex]3[/latex] yards, lost [latex]10[/latex] yards, gained [latex]25[/latex] yards, and then lost [latex]2[/latex] yards in a game, what were his total yards for the game? To figure this out, you’ll need to add integers.

Before you get started in this module, try a few practice problems and review prior concepts.

### readiness quiz

1)

If you missed this problem, review the following video.

2)

If you missed this problem, review the following video.

### Candela Citations

CC licensed content, Shared previously

- Iowa beats Michigan--Running back Mark Weisman on a carry.
**Authored by**: Phil Roeder.**Located at**: https://www.flickr.com/photos/tabor-roeder/11079056895/.**License**:*CC BY: Attribution* - Ex: Substitute and Evaluate Expressions x^2+3, (x+3)^2, x^2+2x+3.
**Authored by**: James Sousa (Mathispower4u.com).**Located at**: https://youtu.be/dkFIVfJTG9E.**License**:*CC BY: Attribution* - Write Algebraic Expressions from Statements: Form ax+b and a(x+b).
**Authored by**: James Sousa (Mathispower4u.com).**Located at**: https://youtu.be/Hub7ku7UHT4.**License**:*CC BY: Attribution* - Question ID: 144886, 144916.
**Authored by**: Lumen Learning.**License**:*CC BY: Attribution*.**License Terms**: IMathAS Community License CC-BY + GPL

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- Prealgebra.
**Provided by**: OpenStax.**License**:*CC BY: Attribution*.**License Terms**: Download for free at http://cnx.org/contents/caa57dab-41c7-455e-bd6f-f443cda5519c@9.757