Ask Dr. Math Elementary Number Sense/About Numbers

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Ask Dr. Math Elementary Number Sense/About Numbers

This question and answer service for math students and their teachers offers a searchable archive all about numbers and number sense at the elementary level.

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Contributed by: The Math Forum @ Drexel, Author

Math TopicMathematics History, Number Sense, Basic Operations, Number Concepts, Mathematical Practices, Mathematical Processes

Grade Level3, 4, 5, 6+

Resource TypeReference Materials, Community

Additional Information
- AudienceEducator, General Public, Learner, Parent/Guardian, Professional/Practitioner
- LanguageEnglish (USA)
- Education TopicMisconceptions
- Interdisciplinary Connection
- Professional DevelopmentNo
- ContributorThe Math Forum @ Drexel, Author
- Publication Date1996
- RightsCopyright (c) 1994-2012 Drexel University
  http://mathforum.org/announce/terms.html
- AccessFree access
Standards
- Common Core State Standards for Mathematics
  Select a standards document:
- Standards for Mathematical Practice[K-12]
- Attend to precision.[K-12]
- Number and Operations in Base Ten[K - 5]
- Generalize place value understanding for multi-digit whole numbers.[4]
- 1. Recognize that in a multi-digit whole number, a digit in one place represents ten times what it represents in the place to its right. For example, recognize that 700 ÷ 70 = 10 by applying concepts of place value and division.[4]
- 2. Read and write multi-digit whole numbers using base-ten numerals, number names, and expanded form. Compare two multi-digit numbers based on meanings of the digits in each place, using >, =, and < symbols to record the results of comparisons.[4]
- 3. Use place value understanding to round multi-digit whole numbers to any place.[4]
- Understand the place value system.[5]
- 1. Recognize that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left.[5]
- 2. Explain patterns in the number of zeros of the product when multiplying a number by powers of 10, and explain patterns in the placement of the decimal point when a decimal is multiplied or divided by a power of 10. Use whole-number exponents to denote powers of 10.[5]
- 4. Use place value understanding to round decimals to any place.[5]
- 3. Read, write, and compare decimals to thousandths.[5]
- a. Read and write decimals to thousandths using base-ten numerals, number names, and expanded form, e.g., 347.392 = 3 × 100 + 4 × 10 + 7 × 1 + 3 × (1/10) + 9 × (1/100) + 2 × (1/1000).[5]
- b. Compare two decimals to thousandths based on meanings of the digits in each place, using >, =, and < symbols to record the results of comparisons.[5]
Related Resources
- Ask Dr. Math

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Ask Dr. Math Elementary Number Sense/About Numbers

Common Core State Standards for Mathematics