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Ones Rule in Multiplication micro-lesson

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When you are solving multiplication problems with the number one, there is a simple rule that you can use to help you solve these problems, and we call this the Ones Rule in multiplication. This just means that any multiplication problem where you're multiplying by 1, the answer is always the other number. So, when you multiply anything times 1, the answer is itself. So, if you are multiplying 1,000 x 1, the answer is 1,000. If you're multiplying 1 million x 1, the answer is a million. So, to look at this, we're going to look at 8 x 1. In this, you have 8 groups, 1 item in each group so your answer is 8. If we reverse this and we do 1 x 8, that means we have 1 group, 8 items in that group and your answer is also 8.

Examples of 1Question Maths Questions

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Here are some example of questions about this video that kids may be asked in the 1Question app to earn screen time.

  • What is the answer to 1,000,000 x 1?

    1) 1000000
    2) 1
    3) 1000
    4) 100
  • What is the answer to 17 x1?

    1) 17
    2) 7
    3) 1
    4) 170
  • What is the answer to 1 x 800?

    1) 800
    2) 8
    3) 18
    4) 80
  • What is the answer to 802 x 1?

    1) 802
    2) 82
    3) 2
    4) 74
  • What is the answer to 1,559 x 1?

    1) 1559
    2) 1555
    3) 157
    4) 1
  • What is the answer to 1,000 x 1 ?

    1) 1000
    2) 1000000
    3) 1
    4) 100
  • When you multiply an number by 1, what is the answer?

    1) Itself
    2) One
    3) Zero
    4) One Hundred
  • What is the rule discussed in this video?

    1) Ones Rule
    2) Zero Rule
    3) Rule with Nines
    4) Rules with Tens
  • Is the ones rule in multplication true if the one is the first or second number in the equation?

    1) Yes
    2) No

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Kristin Tracy

Kristin Tracy

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