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| a group of 3 digits in a place-value chart. |
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| position of a digit in a number |
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is the product of a digit multiplied by its place Example: The ___________ of 2 in 4,281 is 200. |
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| the usual or common way to write a number |
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| a way of writing a number as the sum of the values of its digits |
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| a number with one or more digits to the right of the decimal point, such as 8.37 or 0.05. |
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| a number that names part of a whole or part of a group |
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| decimals that name the same number |
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| a line on which numbers can be written or visualized |
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| equivalent forms of a number |
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different forms of the same number 1/2 = 0.05 = 50% |
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| a point of reference from which other measurements may be estimated |
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| to find a number that is close to the exact answer without calculating an exact answer. |
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| any one of the numbers 0,1,2,3, and so on. |
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| to find the nearest value of a number based on a given place |
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Definition
| Associative, Commutative, and Identity properties |
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| Associative Property of Addition |
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Definition
| a property of addition that states when adding 3 addends, the grouping of the addends does not change a sum. |
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| Identity Property of Addition |
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Definition
| Property of Addition that states that when a number is added to 0, the sum is that number |
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| Commutative Property of Addition |
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| An Addition Property that states when adding, the order of addends does not change the sum |
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Definition
a mental math technique for adding or subtracting 2 numbers, involving doing the same of the opposite operation to the 2 numbers. Example: 298 + 236 = (298 + 2) + (236 - 2) = 300 + 234 = 534 |
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| a network of evenly spaced, parallel, horizontal and vertical lines |
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a group of objects separated into rows and columns |
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a. a number that is multiplied to give a product b. a whole number is a ________ of another whole number if the remainder is 0 when the second is divided by the first. |
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| the answer in a multiplication problem |
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| a way to estimate a sum by changing the addends that are close in value to one common number and multiplying by the number of addends |
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Properties of Multiplication |
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Definition
| Associative, Commutative, Distributive, Identity, and Zero properties |
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Commutative Property of Multiplication |
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| a property that states that the order of the factors does not change the product. |
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Associative Property of Multiplication |
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| A property that states that the way factors are grouped does not change a product. |
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Zero Property of Multiplication |
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A property that states the product of any factor and 0 equals 0. |
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Identity Property of Multiplication |
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| A property that states the product of any factor and 1 is that factor. |
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| Distributive Property of Multiplication over Addition |
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Definition
| A property that states to multiply a sum by a number, you can multiply each addend by the number and add the products. |
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Distributive Property of Multiplication over Subtraction |
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| A property that states to multiply a difference of 2 numbers by a third number, you can multiply each of the first 2 numbers by the third and then find the difference of the products. |
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a. a side of a polygon, or a face of a 3-dimensional figure, usually the one at the bottom. b. the number that is to be raised to a given exponent |
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| a number obtained by raising 10 to a given exponent |
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Definition
| a number expressed as the product of 2 factors where the first factor is between 1 and 10 and the second factor is a power of 10 |
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| a number obtained by raising a base to an exponent |
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| the number that tells how many times a base is used as a factor |
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In division, the number left over after the quotient is found. |
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| the number by which a dividend is divided |
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| the answer to a division problem |
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| a group of related facts using the same numbers |
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| those numbers that can easily be added, subtracted, multiplied, or divided mentally |
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Sometimes in division, the quotient does not end. This is called ______________. |
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