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4th grade · Math · Unit 3 of 15

Multiply & Divide

Bigger numbers by one digit

What your child practices

Multiplying and dividing 2- and 3-digit numbers by 1-digit numbers by splitting them by place value, plus remainders, estimating and word problems.

Maine Learning Results learning standard: 4.NBT.B.5; 4.NBT.B.6 · multiplying by one digit and dividing with remainders

How we explain it

Children can open this short lesson before they practice.

  1. Break the bigger number into tens and ones.
  2. Multiply each part.
  3. Add the parts back together.

Example: 3 × 24 = ? 24 is 20 + 4. 3 × 20 = 60 and 3 × 4 = 12. 60 + 12 = 72. Answer: 72

Multiply & Divide in Maine

In the Maine Learning Results, this is unit 3 of 15 in 4th grade Math, after Add & Subtract and before Fractions.

Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.

Source: Maine Department of Education

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    Which shows a way to find 9 × 92?

    • 9 × 90 + 9 × 2
    • 9 × 90 + 2
    • 9 × 9 + 9 × 2
    • 9 × 90 × 2

  2. Question 2

    A farmer plants 99 sunflowers in each field. How many sunflowers are in 8 fields?

    🌻

    answer box

  3. Question 3

    What is 20 × 6?

    20 × 6 = ?

    • 120
    • 1200
    • 140
    • 12

  4. Question 4

    What is 69 × 8?

    69 × 8 = ?

    answer box

  5. Question 5

    60 paintbrushes are shared equally by 4 tables. How many paintbrushes does each table get?

    🎨

    answer box

  6. Question 6

    What is 83 ÷ 7?

    83 ÷ 7

    • 10 R13
    • 12 R6
    • 11 R6
    • 11 R5

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