Reading and Writing Decimals to Thousandths is the Grade 5 skill of students read and write decimals to thousandths using base-ten numerals, number names, and expanded form. For example, they write 347.392 as 3 × 100 + 4 × 10 + 7 × 1 + 3 × (1/10) + 9 × (1/100) + 2 × (1/1000).
Which place values matter most, and how does the decimal point guide the work?
Strong understanding comes from naming what the numbers, shapes, units, or data values represent, then showing the idea with a model or clear steps before solving.
The key to this topic is understanding the structure behind the work, not just following a rule. Students should be able to talk through what is happening, point to a model, and explain why the answer makes sense.
- Name the place of each important digit before comparing or computing.
- Use place value patterns to explain what happens when values shift.
- Estimate first so the final answer can be checked for reasonableness.
- Use the topic language from class discussions: Students read and write decimals to thousandths using base-ten numerals, number names, and expanded form. For example, they write 347.392 as 3 × 100 + 4 × 10 + 7 × 1 + 3 × (1/10) + 9 × (1/100) + 2 × (1/1000).