🇺🇸 CCSS Math · Grade 6

6.NS.B.2: Long division with multi-digit numbers

6.NS.B.2 explained: fluent long division of multi-digit numbers with the standard algorithm, typical slips, a worked example and free practice.

Common Core standard CCSS.Math.Content.6.NS.B.2

Fluently divide multi-digit numbers using the standard algorithm.

Grade
Grade 6
Domain
The Number System (NS)
Cluster
Compute fluently with multi-digit numbers and find common factors and multiples

Official wording from the Common Core State Standards for Mathematics (© 2010 National Governors Association Center for Best Practices and Council of Chief State School Officers). View on thecorestandards.org

What 6.NS.B.2 means

By sixth grade, students are expected to divide multi-digit whole numbers quickly and accurately using the standard long division algorithm. Earlier grades built the meaning with place value, area models and partial quotients; here the goal is fluency, so dividing something like 8,976 by 24 should feel routine.

Fluency means more than memorizing steps. Each cycle of the algorithm, divide, multiply, subtract and bring down, works because the dividend is broken up by place value. When students divide 8,976 by 24, the first step really asks how many groups of 24 fit into 89 hundreds. Students who understand that can estimate before they start, notice when a digit in the quotient should be zero, and interpret a remainder sensibly in a word problem, whether that means rounding up, dropping it, or writing it as a fraction or decimal. Sixth grade fluency here also pays off right away, because dividing decimals in 6.NS.B.3 and converting fractions to decimals in seventh grade both run on the same algorithm.

Students should be able to

  • Divide multi-digit whole numbers by two-digit and three-digit divisors with the standard algorithm.
  • Estimate a quotient before dividing to check that the answer is reasonable.
  • Place zeros in the quotient correctly when a divisor does not fit into part of the dividend.
  • Check a division by multiplying the quotient by the divisor and adding the remainder.
  • Decide what a remainder means in a word problem.

Common misconceptions

Skipping a zero in the quotient

When the divisor does not go into the next partial dividend, students bring down another digit but forget to write a 0, so 2,436 ÷ 12 comes out as 23 instead of 203.

Remainder larger than the divisor

If the remainder after a step is bigger than or equal to the divisor, the quotient digit was too small. Teach students to compare every remainder with the divisor.

Misaligned digits

Writing the quotient digits in the wrong columns hides place value errors. Graph paper or lined-up columns help students keep each digit above its place.

Ignoring the context of a remainder

If 130 students ride buses holding 24 each, 5 buses with a remainder of 10 means 6 buses are needed. The remainder changes the answer.

Worked example: 8,976 ÷ 24

Divide 8,976 by 24 using the standard algorithm.

  1. Estimate first: 24 is about 25, and 8,976 ÷ 25 is a little under 360, so expect an answer near 370.
  2. 24 into 89: 3 times (72). Subtract: 89 - 72 = 17. Bring down 7 to make 177.
  3. 24 into 177: 7 times (168). Subtract: 177 - 168 = 9. Bring down 6 to make 96.
  4. 24 into 96: 4 times exactly (96). Remainder 0. Check: 374 × 24 = 8976.

Answer: 8,976 ÷ 24 = 374.

Teaching 6.NS.B.2

Keep a short estimation step before every long division problem; it catches most misplaced or missing digits. A quick list of the first few multiples of the divisor beside the problem (24, 48, 72, 96, 120) reduces trial-and-error for two-digit divisors.

Fluency practice works best in short, frequent sets. Word problems should include remainders that must be rounded up, dropped or shared, so students practice deciding what the remainder means.

6 practice questions

Original questions written for this standard. Choose an option or type your answer, then press Check. Every question has a worked explanation.

Score: 0 / 6(0 of 6 checked)
  1. 1.

    What is 1,512 ÷ 36?

    Answer and explanation

    Answer: 42

    36 into 151 goes 4 times (144), remainder 7. Bring down 2 to get 72; 36 into 72 goes 2 times. The answer is 42.

  2. 2.

    What is 2,436 ÷ 12?

    Question 2 options
    Answer and explanation

    Answer: C) 203

    12 into 24 is 2. 12 into 3 is 0, so write 0 and bring down 6 to make 36. 12 into 36 is 3. The quotient is 203.

  3. 3.

    What is 9,750 ÷ 25?

    Answer and explanation

    Answer: 390

    25 into 97 is 3 (75), remainder 22. Bring down 5: 225 ÷ 25 = 9. Bring down 0: 0 ÷ 25 = 0. The answer is 390.

  4. 4.

    130 students are going on a trip. Each bus holds 24 students. How many buses are needed?

    Question 4 options
    Answer and explanation

    Answer: A) 6

    130 ÷ 24 = 5 remainder 10. Five buses leave 10 students behind, so 6 buses are needed.

  5. 5.

    What is 6,048 ÷ 112?

    Answer and explanation

    Answer: 54

    112 into 604 is 5 (560), remainder 44. Bring down 8 to get 448; 112 into 448 is 4. The answer is 54.

  6. 6.

    Which estimate is best for 4,795 ÷ 61?

    Question 6 options
    Answer and explanation

    Answer: C) About 80

    Round to 4,800 ÷ 60 = 80. The exact answer is about 78.6, so 80 is a good estimate.

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FAQ

Does 6.NS.B.2 require the standard algorithm?

Yes. Earlier grades allow strategies like partial quotients, but this standard asks for fluent division using the standard algorithm.

How big are the numbers in 6.NS.B.2?

The standard says multi-digit numbers. In practice that means dividends in the thousands or more with two- or three-digit divisors.

More grade 6 The Number System standards

6.NS.A.1: Dividing fractions by fractions6.NS.B.3: Operations with multi-digit decimals6.NS.B.4: GCF, LCM and the distributive property6.NS.C.5: Positive and negative numbers in context6.NS.C.6: Rational numbers on number lines and coordinate planes6.NS.C.7: Ordering rational numbers and absolute value6.NS.C.8: Distance on the coordinate plane
All Grade 6 math standards →Standards home →