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3.02 Groups and arrays

Lesson

Are you ready?

Do you remember how multiplication can be thought of as repeated addition?

Answer the following:

  1. Write this addition as a multiplication.

    $10+10+10+10+10+10+10+10$10+10+10+10+10+10+10+10

  2. Find the value of $8\times10$8×10.

Learn

In this video we see how rows and columns (called an array), can be used to solve multiplication.

 

Apply

Which of these number sentences describe the array?

  1. There may be more than one correct answer.

    $16\times8=2$16×8=2

    A

    $8\times2=16$8×2=16

    B

    $16\times2=8$16×2=8

    C

    $2\times8=16$2×8=16

    D

    $16\times8=2$16×8=2

    A

    $8\times2=16$8×2=16

    B

    $16\times2=8$16×2=8

    C

    $2\times8=16$2×8=16

    D

Remember!

We get the same answer whichever way we look at our array.

Outcomes

VCMNA155

Recall multiplication facts up to 10 × 10 and related division facts

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