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Cogito

Grade 3 Math · Chapter 3 · Lesson 5

Practice Worksheet

The Associative Property

Multiply three numbers in any order you like.

10 problems · about 13 minutes · 3.OA.B.5

NameDate

Figure — use these to answer the problems

Two of the three factors make one array. The third repeats it.

2 × 3 = 6

First factor2
Second factor3
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

3 problems

  1. From “Multiplying by 8 and 9”

    7 × 9 = ?

    Answer

  2. From “Multiplying by 7”

    8 × 7 = ?

    Answer

  3. From “Multiplying by 6”

    9 × 6 = ?

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. 2 × 5 × 6 = ?

    Answer

  2. Does regrouping change the product?

    • No. Only the work changes.
    • Yes. The answer changes.

  3. 2 × 3 × 5 = ?

    Answer

Build It Up

The same ideas with more to keep track of.

1 problem

  1. 5 × 2 × 7 = ?

    Answer

Stretch Yourself

Mixed problems. Work out what kind of question it is before you start.

3 problems

  1. 3 × 12 = ? Try 3 × 2 × 6.

    Answer

  2. Three Factors

    2 × 4 × 5 = ?

    Answer

  3. The Crates

    3 crates each hold 2 boxes of 6 apples. How many apples?

    Answerapples