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Cogito

Grade 3 Math · Chapter 3 · Lesson 10

Practice Worksheet

Two-Step Problems With a Letter

Naming the number you do not know yet.

10 problems · about 15 minutes · 3.OA.D.8

NameDate

Figure — use these to answer the problems

The array does the first step. The second step comes after.

4 × 6 = 24

How many groups4
How many in each6
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

2 problems

  1. From “Multiplication and Division Fluency”

    7 × 6 = ?

    Answer

  2. From “Patterns in the Times Tables”

    Is 8 × 7 odd or even?

    • Even
    • Odd

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. 8 × 5 − 14 = ?

    Answer

  2. What does a letter stand for in an equation?

    • A number you have not found yet.
    • Any letter of the alphabet.

  3. 7 × 4 − 8 = ?

    Answer

Build It Up

The same ideas with more to keep track of.

1 problem

  1. 45 ÷ 5 + 6 = ?

    Answer

Stretch Yourself

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

4 problems

  1. 6 × 6 − 10 = ?

    Answer

  2. The Bookshop

    5 shelves hold 8 books each. 12 books are sold. How many are left?

    Answerbooks

  3. The Party Bags

    36 sweets are shared into 6 bags. Then 2 sweets are added to one bag.

    Answersweets in that bag

  4. The Coins

    Ana has 3 bags of 9 marbles and loses 7. How many are left?

    Answermarbles