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Cogito

Grade 3 Math · Chapter 5 · Lesson 3

Practice Worksheet

Fractions as Copies of a Unit

Three quarters is three one-quarters.

10 problems · about 12 minutes · 3.NF.A.1

NameDate

Figure — use these to answer the problems

Shade one piece at a time and watch the top number count them.

0/4 shaded

How many equal parts4
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

3 problems

  1. From “Unit Fractions”

    Which is bigger, 1/4 or 1/6?

    • 1/4
    • 1/6

  2. From “Equal Parts of a Whole”

    A shape cut into 5 equal parts. What is the denominator?

    Answer

  3. From “Area of Joined Shapes”

    A 6 by 3 part and a 4 by 2 part. Total area?

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. How many copies of 1/8 make 5/8?

    Answer

  2. 6 equal parts, 4 shaded. What fraction is shaded?

    Answersixths

  3. How many copies of 1/4 make 3/4?

    Answer

Build It Up

The same ideas with more to keep track of.

1 problem

  1. 2 pieces out of 5 equal parts. What is the numerator?

    Answer

Stretch Yourself

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

3 problems

  1. 2 pieces out of 5 equal parts. What is the denominator?

    Answer

  2. The Chocolate Bar

    A bar has 8 equal pieces. You eat 5. What fraction did you eat?

    Answereighths

  3. Counting Copies

    How many copies of 1/6 make 4/6?

    Answer