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Cogito

Grade 3 Math · Chapter 1 · Lesson 9

Practice Worksheet

Multiplying by 0 and 1

Two special cases that trip people up.

10 problems · about 11 minutes · 3.OA.B.5, 3.OA.C.7

NameDate

Figure — use these to answer the problems

Set the columns to 1, then to 0, and watch the array.

1 + 1 + 1 + 1 + 1 + 1 + 1 = 7

7 × 1 = 7

Rows7
Columns1
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

2 problems

  1. From “Multiplying and Dividing by 3 and 4”

    8 × 3 = ?

    Answer

  2. From “Dividing by 2, 5, and 10”

    40 ÷ 5 = ?

    Answer

Warm Up

Straightforward practice. Get the method working first.

4 problems

  1. 7 × 0 = ?

    Answer

  2. Why does 6 × 1 = 6?

    • It is one group of 6.
    • Because that is the rule.

  3. 8 × 1 = ?

    Answer

  4. 8 × 0 = ?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. 0 × 6 = ?

    Answer

  2. 9 ÷ 1 = ?

    Answer

Stretch Yourself

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

2 problems

  1. Empty Plates

    5 plates have no biscuits on them. How many biscuits are there?

    Answerbiscuits

  2. One Bag

    One bag holds 9 marbles. How many marbles in all?

    Answermarbles