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3rd grade · Math · Unit 10 of 18

Halves & Fourths of an Inch

Measure to 1/4 inch

What your child practices

Measuring lengths to the nearest half and quarter inch, then reading the measurements from a table like a line plot.

Texas Essential Knowledge and Skills (TEKS) teks student expectation: 3.7(A); 3.8(A) · measuring to the nearest half and fourth of an inch and showing the data in a dot plot

How we explain it

Children can open this short lesson before they practice.

  1. Each inch on the ruler is split into 4 equal parts.
  2. Count the whole inches, then the parts: 2/4 is the same as 1/2.
  3. A line plot shows how many objects have each length.

Example: A crayon starts at 0 and ends at the second mark after 2. How long is it? 2 whole inches. 2 marks is 2/4 = 1/2. Answer: 2 1/2 inches

Halves & Fourths of an Inch in Texas

In the Texas Essential Knowledge and Skills (TEKS), this is unit 10 of 18 in 3rd grade Math, after Fractions and before Area & Perimeter.

Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.

Source: Texas Education Agency (TEA)

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    How many pencils are longer than 2 3/4 in?

    Pencil lengths
    LengthPencils
    2 1/4 in5
    2 3/4 in6
    3 1/4 in4
    3 3/4 in3
    • 5
    • 4
    • 6
    • 7

  2. Question 2

    How many pencils are 2 1/2 in long?

    Pencil lengths
    LengthPencils
    1 in5
    1 1/2 in4
    2 in6
    2 1/2 in3
    • 1
    • 3
    • 4
    • 5

  3. Question 3

    Which length is the most common?

    Pencil lengths
    LengthPencils
    1 1/4 in5
    1 3/4 in6
    2 1/4 in3
    2 3/4 in1
    • 1 1/4 in
    • 2 1/4 in
    • 1 3/4 in
    • 2 3/4 in

  4. Question 4

    How many pencils were measured in all?

    Pencil lengths
    LengthPencils
    2 1/4 in2
    2 3/4 in4
    3 1/4 in1
    3 3/4 in5
    • 12
    • 11
    • 10
    • 9

  5. Question 5

    The dots mark the ends of a leaf on an inch ruler. How long is it?

    012345
    • 4 1/4 in
    • 5 in
    • 6 in
    • 4 in

  6. Question 6

    Which is longer: 2 1/4 in or 2 3/4 in?

    • 2 1/4 in
    • 2 3/4 in

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