Fractions Round Table

10 min

Narrative

The purpose of this What Do You Know about _____? is to invite students to share what they know about, and how they can represent, the number 18\frac{1}{8}.

Launch

  • Display the number.
  • “What do you know about 18\frac{1}{8}?”
  • 1 minute: quiet think time
Activity
  • Record responses.
  • “How could we represent the number 18\frac{1}{8}?”

Student Task

What do you know about 18\frac{1}{8}?

Sample Response

Sample responses:
  • 18\frac{1}{8} is 1 part when the whole is split into 8 equal parts.
  • 18\frac{1}{8} is smaller than 12\frac{1}{2}.
  • Students may represent 18\frac{1}{8} on a number line or with a diagram.

Synthesis

  • “What connections do you see between different answers?”
Standards
Building On
  • 3.NF.1·Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b.
  • 3.NF.2·Understand a fraction as a number on the number line; represent fractions on a number line diagram.
  • 3.NF.3·Explain equivalence of fractions in special cases, and compare fractions by reasoning about their size.
  • 3.NF.A.1·Understand a fraction <span class="math">\(1/b\)</span> as the quantity formed by 1 part when a whole is partitioned into <span class="math">\(b\)</span> equal parts; understand a fraction <span class="math">\(a/b\)</span> as the quantity formed by <span class="math">\(a\)</span> parts of size <span class="math">\(1/b\)</span>.
  • 3.NF.A.2·Understand a fraction as a number on the number line; represent fractions on a number line diagram.
  • 3.NF.A.3·Explain equivalence of fractions in special cases, and compare fractions by reasoning about their size.

35 min