A repair company charges a $42 visit fee plus $18 per hour. The bill was $150. How many hours did the repair take?
Reasoning Strategy
Write 42 + 18h = 150 and solve for h.
AI Support Preview
Separate the one-time fee from the hourly rate.
Public Practice Guide
Use this guide to see the type of reasoning MathRoutine expects for grade 8 linear equations word problems. The goal is not worksheet volume; it is helping students read the situation, choose a model, and explain why the answer fits.
What Students Practice
Reasoning Patterns
Sample Problems
These grade-specific examples show the kind of student-visible reasoning MathRoutine is designed to support: identifying the important quantities, choosing the right structure, and checking the final answer against the story.
A repair company charges a $42 visit fee plus $18 per hour. The bill was $150. How many hours did the repair take?
Reasoning Strategy
Write 42 + 18h = 150 and solve for h.
AI Support Preview
Separate the one-time fee from the hourly rate.
A student has 18 solved problems and plans to solve the same number each day. After 6 days, the student has 72 solved problems. How many problems were solved each day?
Reasoning Strategy
Model the starting amount plus 6 equal daily amounts.
AI Support Preview
Prevent using 72 as the number solved during the 6 days.
A bike rental costs $12 plus $4.50 per hour. A rider has $39. What is the greatest whole number of hours the rider can rent the bike?
Reasoning Strategy
Solve an inequality and interpret the whole-number limit.
AI Support Preview
Use the budget as a maximum, not an exact target.
Practice Ladder
Modeled after middle-school workbook expectations: combine fluency with ratio, percent, equation, and geometry reasoning rather than only isolated computation.
Identify the variable and the quantity it represents in the story.
Write the equation or function from fixed amounts, rates, and constraints.
Interpret the solution in context, including units and whether the answer is reasonable.
Assessment Signals
A guide is useful only if it clarifies what teachers and parents should look for in student work. MathRoutine tracks these signals during practice instead of treating every miss as the same mistake.
Common Mistakes
Learning Loop
A strong word problem platform should not only say right or wrong. It should notice the pattern: missed unit rate, ignored leftover, reversed comparison, wrong base percent, or equation setup error.
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Attempt
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Diagnosis
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Next practice
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