Florida B.E.S.T. MA.6.NSO.2.1
The Standard
Multiply and divide positive multi-digit numbers with decimals to the thousandths, including using a standard algorithm with procedural fluency.
Florida B.E.S.T. Standards for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students multiply and divide positive decimals through the thousandths using standard written algorithms. They place decimal points correctly and check whether answers are reasonable.
What Mastery Looks Like
- Students accurately solve decimal multiplication and division problems using organized standard algorithms. They place decimal points correctly and use estimation or inverse operations to check their work.
Common Misconceptions
- Students often align decimal points when multiplying instead of counting decimal places in the factors. They may shift the decimal in the divisor without shifting it equally in the dividend. They may also omit placeholder zeros or accept an unreasonable answer without estimating.
How to Assess It
- Have students solve 4.275 × 3.6 and 18.144 ÷ 2.4 using standard algorithms. Ask them to estimate first and check each answer.
Lesson moves
Ways to Teach It
Use place-value mats and digit cards to model 2.34 × 1.2, then connect each move to the written algorithm.
Ask students to write why shifting both decimals in 18.144 ÷ 2.4 keeps the quotient unchanged.
Play Decimal Algorithm Relay, where teams solve cards, estimate first, and score only when both the algorithm and check are correct.
Find the cost of 3.75 kilograms at $2.48 per kilogram, then explain whether the answer is reasonable.
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Printable MA.6.NSO.2.1 Worksheet
A ready-to-print activity worksheet aligned to MA.6.NSO.2.1, with an answer key for the teacher on its own page. No account needed.
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Related Standards
- MA.5.NSO.2.3
Add and subtract multi-digit numbers with decimals to the thousandths, including using a standard algorithm with procedural fluency.
- MA.5.NSO.2.1
Multiply multi-digit whole numbers including using a standard algorithm with procedural fluency.
- MA.5.NSO.2.2
Divide multi-digit whole numbers, up to five digits by two digits, including using a standard algorithm with procedural fluency. Represent remainders as fractio...
- MA.5.NSO.2.5
Multiply and divide a multi-digit number with decimals to the tenths by one-tenth and one-hundredth with procedural reliability.
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