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Grade 5 Math — Decimals

Compare and order decimals, add and subtract them, and switch between decimals and fractions.

Name: ________________________

Before you start

Move between 3 and 4 in tenths. A whole line of numbers is hiding between two whole ones.

3.03.13.23.33.43.53.63.73.83.94.0

Nothing says the line has to stop at tenths. Chop each of these gaps into ten again and hundredths appear — 3.14, 3.15 — and you could keep chopping for ever.

  1. 1.8.6 - 3.75 = ?

  2. 2.Match each fraction to the decimal that is worth the same.

    • 1/2
    • 1/4
    • 3/4
    • 1/5
    • 3/10
    • 0.3
    • 0.25
    • 0.5
    • 0.2
    • 0.75

  3. 3.What is 0.6 + 0.45?

  4. 4.A pencil is 12.5 inches long and a pen is 14.2 inches long. How much longer is the pen, in inches? Give just the number.

  5. 5.Write 7/10 as a decimal.

  6. 6.Tap where 2.75 sits.

    Mark the line with an X.

    2.002.252.502.753.00

  7. 7.3.4 + 2.75 = ?

  8. 8.Which of these decimals is the largest?

    • a) 0.609
    • b) 0.5
    • c) 0.7
    • d) 0.68

Answer key — Grade 5 Math — Decimals

  1. 1. 4.85
  2. 2. 1/2 → 0.5; 1/4 → 0.25; 3/4 → 0.75; 1/5 → 0.2; 3/10 → 0.3
  3. 3. 1.05
  4. 4. 1.7
  5. 5.
    • 0.7
    • .7
    • 0.70
  6. 6. 2.75
  7. 7. 6.15
  8. 8. c) 0.7