Florida B.E.S.T. MA.K12.MTR.6.1
The Standard
Assess the reasonableness of solutions. Mathematicians who assess the reasonableness of solutions: Estimate to discover possible solutions. Use benchmark quantities to determine if a solution makes sense. Check calculations when solving problems. Verify possible solutions by explaining the methods used. Evaluate results based on the given context.
Florida B.E.S.T. Standards for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students estimate before or during a problem to predict a sensible answer. They solve, check their calculations, and use benchmarks, units, and context to judge the result.
What Mastery Looks Like
- A student estimates a likely range, solves, and compares the result with that range. The student checks calculations and explains why the answer fits the quantities, units, and situation.
Common Misconceptions
- Students may assume any exact calculation must be reasonable. They may ignore units, benchmarks, signs, or impossible results, such as negative distance or a probability above 1.
How to Assess It
- Use this exit ticket: “A student says 198 × 6 = 11,880. Estimate, decide whether the answer is reasonable, correct it, and explain your check.”
Lesson moves
Ways to Teach It
Fill a clear jar with linking cubes, have students estimate, count, and explain whether their estimate and final total are reasonable.
Show an incorrect solution from the current unit and ask, “What clue shows the answer cannot make sense?”
Play Reasonable or Not with solution cards; teams estimate, classify each answer, then earn a point by proving their choice.
Use a grocery receipt or online cart to estimate the total, calculate it, and check whether the result fits the budget.
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Printable MA.K12.MTR.6.1 Worksheet
A ready-to-print activity worksheet aligned to MA.K12.MTR.6.1, with an answer key for the teacher on its own page. No account needed.
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