A-REI-A: Reasoning with Equations — UnderstandingMCAP Algebra I Evidence Statement
Explain each step in solving a simple equation as following from the equality of numbers asserted at the previous step, starting from the assumption that the original equation has a solution.
What A-REI-A covers
Explain each step in solving a simple equation as following from the equality of numbers asserted at the previous step, starting from the assumption that the original equation has a solution.
SlopeFactor maps every practice problem directly to A-REI-A. When you work a mission tagged to this evidence statement, you are practicing exactly the skill Maryland measures on MCAP Algebra I — no filler, no off-standard content. After completing A-REI-A missions, your win report shows your mastery level for this specific standard so you know exactly where you stand.
Frequently asked questions about A-REI-A
- What does A-REI-A cover on MCAP Algebra I?
- A-REI-A asks students to explain the reasoning behind each algebraic step — why an operation is valid and what it preserves.
- How is A-REI-A assessed?
- Constructed-response items on MCAP Algebra I often ask students to justify solution steps, making A-REI-A a high-value reasoning standard.
Related MCAP Algebra I evidence statements
Practice A-REI-A on SlopeFactor
Free for all Maryland public school students. Sign in with your school Google account to start your first A-REI-A mission.
Get started — it's free