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4th grade · Math · Unit 2 of 17

Tenths & Decimals

Decimal tenths

What your child practices

Reading, comparing, ordering and rounding decimal tenths, linking them to fractions, and adding and subtracting them.

Texas Essential Knowledge and Skills (TEKS) teks student expectation: 4.2(E); 4.2(G) · tenths and hundredths with models and money, and decimals as fractions

How we explain it

Children can open this short lesson before they practice.

  1. A tenth is 1 of 10 equal parts: 0.1.
  2. 9/10 is 0.9. Say it nine tenths.
  3. Line up decimal points to add and subtract.

Example: What is 2.6 + 3.9? Tenths: 6 + 9 = 15, so write 5 and regroup 1. Ones: 2 + 3 + 1 = 6. Answer 6.5. Answer: 6.5

Tenths & Decimals in Texas

In the Texas Essential Knowledge and Skills (TEKS), this is unit 2 of 17 in 4th grade Math, after Numbers to 10,000 and before Decimals.

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

    What is 2.8 + 7.2?

    2.8 + 7.2 = ?

    answer box

  2. Question 2

    What is 6.6 − 1.4?

    6.6 − 1.4 = ?

    answer box

  3. Question 3

    Tap the decimals from least to greatest.

    • 1.7
    • 0.7
    • 1.5
    • 0.8

  4. Question 4

    The bar has 10 equal parts. What decimal shows the shaded part?

    • 0.1
    • 0.01
    • 1.0

  5. Question 5

    Which sign goes in the box?

    0.4 1.7

    • >
    • =
    • <

  6. Question 6

    The bar has 10 equal parts. What decimal shows the shaded part?

    • 0.8
    • 0.08
    • 8.0

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