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| The symbols used to show numbers: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 |
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The position of a digit in a number that is used to determine the value of the digit.
Example: In 5,318 the 3 is in the hundreds place. So the 3 has a value of 300 |
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Definition
| A group of 3 digits in a number. Periods are separated by a comma and start from the right of a number. |
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A number written with commas separating groups of three digits starting from the right
Example: 3,458 |
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A way to write a number that shows the place value of each digit.
Example: 3,000 + 500 + 60 +2 |
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| A number written in words using place value |
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Definition
| One out of ten equal parts of a whole |
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| One part of 100 equal parts of a whole |
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| One out of 1,000 equal parts of a whole |
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| Decimals which name the same amount Example: 0.7 = 0.70 |
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Definition
| Numbers which are easy to compute with mentally |
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| Adjusting one number of an operation to make computations easier and balancing the adjustment by changing the other number. |
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Definition
| A process that tells which multiple of 10, 100, 1,000, etc. a number is closest to. |
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Definition
| A method of estimating by changing numbers to the place-value of their front digit and then finding the sum or difference. |
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