Worked Example 1
Standard Form to Word Form
3.405
- 1Read the whole number part: three.
- 2Say "and" for the decimal point.
- 3Read 405 and name the last place, thousandths.
Answer: three and four hundred five thousandths
Florida Grade 5 Math · Number Sense and Operations
MA.5.NSO.1.2: Reading and writing decimals
What this Grade 5 benchmark means, worked examples, common mistakes, and a free printable worksheet.
Created by a Florida mom · Published by Tropical Learning LLC
What Is Benchmark MA.5.NSO.1.2?
In Grade 5, students read and write decimals to the thousandths in three ways: standard form (3.405), word form (three and four hundred five thousandths), and expanded form (3 + 0.4 + 0.005).
In word form, the decimal point is read as "and," and the decimal part is named by its last place: tenths, hundredths, or thousandths.
Official benchmarkRead and write multi-digit numbers with decimals to the thousandths using standard form, word form and expanded form.
On the FAST test: part of the Grade 5 reporting category Number Sense and Operations with Whole Numbers, which is about 23–29% of the test.
Worked Examples
Worked Example 2
Writing Expanded Form
6.284
- 1Write each digit with its value: 6 ones, 2 tenths, 8 hundredths, 4 thousandths.
- 26 + 0.2 + 0.08 + 0.004.
Answer: 6 + 0.2 + 0.08 + 0.004
Common Mistakes to Watch For
Forgetting a zero placeholder
Wrong:five and thirty-six thousandths = 5.36
Thousandths need three decimal places. 36 thousandths is 0.036, so the number is 5.036.
Saying "and" in the wrong place
Wrong:four hundred and five = 400.5
"And" stands only for the decimal point. Four hundred five is 405; four hundred and five tenths is 400.5.
Helpful Math Tip
Say the number out loud. The last word (tenths, hundredths, thousandths) tells you how many digits go after the decimal point.
Related Grade 5 Skills
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Start Practicing FreeIndependent Educational Platform. FastChomp is published by Tropical Learning LLC and is not affiliated with, sponsored by, or endorsed by the Florida Department of Education. FAST and Star assessment names are referenced for informational purposes only. FastChomp practice questions are original educational materials, not official Florida FAST assessment questions.