007. Division with Remainders and Short Division

Learning Intentions

Pre-requisite Summary

Worked Examples

Worked Example 1

Express the result with a remainder and as a mixed numeral:

a) 17÷5
b) 29÷4

Worked Example 2

Use mental strategies:

a) 48÷6
b) 63÷7
c) 96÷8

Worked Example 3

Use mental strategies with remainders:

a) 52÷5
b) 73÷6

Worked Example 4

Use the short division algorithm:

a) 84÷4
b) 156÷3

Worked Example 5

Use the short division algorithm:

a) 728÷6
b) 3645÷5

Problems

Problem 1

a) 19÷6
b) 35÷8

Problem 2

a) 42÷6
b) 72÷9
c) 81÷9

Problem 3

a) 58÷4
b) 67÷5

Problem 4

a) 96÷3
b) 248÷4

Problem 5

a) 735÷5
b) 2864÷4

Exercises

Understanding and Fluency

  1. Write with remainder and as a mixed numeral:
    a) 22÷5
    b) 31÷6
    c) 45÷8

  2. Use mental strategies:
    a) 54÷6
    b) 72÷8
    c) 90÷9

  3. Use mental strategies with remainders:
    a) 64÷6
    b) 77÷8
    c) 95÷7

  4. Use short division:
    a) 84÷7
    b) 156÷4
    c) 245÷5

  5. Use short division:
    a) 672÷6
    b) 3248÷4
    c) 4515÷5

  6. Divide:
    a) 936÷3
    b) 2864÷8
    c) 5425÷5

Reasoning

  1. Explain why 17÷5=3 remainder 2.

  2. A student writes 23÷4=543. Explain the mistake.

  3. How can multiplication help check 84÷4?

  4. Why must the remainder always be less than the divisor?

Problem-solving

  1. 47 students are placed into groups of 5. How many groups and how many left over?

  2. A teacher shares 136 pencils equally among 4 classes. How many pencils per class?

  3. A farmer packs 365 eggs into cartons of 6. How many full cartons and how many eggs remain?

  4. A library divides 2484 books equally onto 6 shelves. How many per shelf?

  5. A factory produces 735 items and packs them into boxes of 5. How many boxes?

Potential Misunderstandings

Next: 008. Rounding and Estimation Strategies