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Cogito

Grade 3 Math · Chapter 5 · Lesson 6

Practice Worksheet

Comparing Fractions With the Same Bottom

Same size pieces, so just count them.

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

NameDate

Figure — use these to answer the problems

Keep both denominators the same and change the top numbers.
5/8
3/8
015/83/8

5/8 is greater than 3/8.

Left top number5
Left bottom number8
Right top number3
Right bottom number8
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

3 problems

  1. From “Fractions Equal to One”

    6/6 equals which whole number?

    Answer

  2. From “Fractions on the Number Line”

    A line cut into 5 parts. How many parts along is 2/5?

    Answer

  3. From “Fractions as Copies of a Unit”

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

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. Which is bigger, 3/4 or 1/4?

    • 3/4
    • 1/4

  2. When does counting the top numbers work?

    • When the denominators are the same.
    • Always.

  3. Which is bigger, 2/7 or 5/7?

    • 5/7
    • 2/7

Build It Up

The same ideas with more to keep track of.

1 problem

  1. Which is bigger, 7/8 or 6/8?

    • 7/8
    • 6/8

Stretch Yourself

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

3 problems

  1. Why can you just count when the denominators match?

    • The pieces are the same size.
    • Because that is the rule.

  2. Two Bars

    Which is bigger, 4/6 or 5/6?

    • 5/6
    • 4/6

  3. The Race

    Ana ran 3/5 of a lap and Leo ran 4/5. Who ran further?

    • Leo.
    • Ana.