Wyoming Math 6.NS.3
The Standard
Add, subtract, multiply, and divide manageable multi-digit decimals using efficient and generalizable procedures including, but not limited to, the standard algorithm for each operation.
2023 Wyoming Mathematics Content and Performance Standards · Compute fluently with multi-digit numbers and find common factors and multiples.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students add, subtract, multiply, and divide multi-digit decimals. They use written steps that work across problems and estimate to check whether each answer makes sense.
What Mastery Looks Like
- Students line up place values when adding and subtracting, place the decimal point correctly in products, and scale both numbers when dividing by a decimal. They can explain their steps and catch an answer that is too large or too small.
Common Misconceptions
- Some students line up the last digits instead of the decimal points when adding or subtracting. Others align decimal points when multiplying or shift the decimal point only in the divisor when dividing.
How to Assess It
- On an exit ticket, ask students to calculate 12.4 + 3.75, 12.4 − 3.75, 2.4 × 1.5, and 4.8 ÷ 0.6. Have them show their steps and estimate each answer.
Lesson moves
Ways to Teach It
Give pairs place-value grids to model 2.4 + 1.35, then have them record how they combined tenths and hundredths.
Ask students to explain in writing why 4.8 ÷ 0.6 equals 48 ÷ 6.
Deal four cards numbered 1 to 9; pairs build two decimals, draw an operation card, calculate, and check with an estimate.
Show a receipt for 2.5 pounds of apples costing $6.25; students find the price per pound and check by multiplying.
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Printable 6.NS.3 Worksheet
A ready-to-print activity worksheet aligned to 6.NS.3, with an answer key for the teacher on its own page. No account needed.
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Related Standards
- 4.NF.3c
Add and subtract mixed numbers with like denominators by replacing each mixed number with an equivalent fraction, and/or by using properties of addition and the...
- 3.NBT.2
Fluently add and subtract within 1,000 using strategies and algorithms based on place value, properties of addition, and/or the relationship between addition an...
- 2.NBT.5
Add and subtract within 100 using strategies based on place value, properties of addition, and/or the relationship between addition and subtraction.
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