Number Sense Review
Digit and value have different meanings.
Which digit is in the thousands place value? 4 What is the value of 4? 4,000
You try:
Which digit is in the ten thousands place value?
What is the value of the number in the ten thousands?
If you see a question that asks “write the name of the place value of the underlined digit,” it is not asking for the digit or the value, but the column name in the place value chart.
Never write large numbers without either commas or spaces separating the numbers in groups of 3.
Always start the commas from the right side of the number.
You try. Fix the following numbers:
71930267 4,8990,0 998 43 2
How many thousand blocks = 10,000? (Answer with a complete sentence)
Practice drawing good cubes to show 1,000 blocks. Always draw base 10 blocks that are equal in value, the same size. For example, make your ten-blocks the same height.
Numerals are digits or numbers.
Write this number in expanded form using numerals and words: 41,821
Write a 5-digit number:
What is a sum?
What is a difference?
When would you need to write out numbers with words?
Example: One thousand two hundred thirty-four
Add a hypen only when you combine the tens and ones place values. Examples: twenty-five, sixty-four.
Know how to spell these math words:
twenty
eighty
thirty
ninety
forty (no ‘u’)
hundred
fifty
thousand
sixty
million
seventy
Which digit is in the thousands place value? 4 What is the value of 4? 4,000
You try:
Which digit is in the ten thousands place value?
What is the value of the number in the ten thousands?
If you see a question that asks “write the name of the place value of the underlined digit,” it is not asking for the digit or the value, but the column name in the place value chart.
Never write large numbers without either commas or spaces separating the numbers in groups of 3.
Always start the commas from the right side of the number.
You try. Fix the following numbers:
71930267 4,8990,0 998 43 2
How many thousand blocks = 10,000? (Answer with a complete sentence)
Practice drawing good cubes to show 1,000 blocks. Always draw base 10 blocks that are equal in value, the same size. For example, make your ten-blocks the same height.
Numerals are digits or numbers.
Write this number in expanded form using numerals and words: 41,821
- numerals:
- words:
Write a 5-digit number:
What is a sum?
What is a difference?
When would you need to write out numbers with words?
Example: One thousand two hundred thirty-four
Add a hypen only when you combine the tens and ones place values. Examples: twenty-five, sixty-four.
Know how to spell these math words:
twenty
eighty
thirty
ninety
forty (no ‘u’)
hundred
fifty
thousand
sixty
million
seventy