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A group of related facts using the same set of numbers. 


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Definition
In a number, a group of three digits, seperated by commas, starting from the right. 


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A way to write a number showing only its digits. 


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A number written as the sum of the values of its digits. Example: 40,000 + 2,000 + 100 + 50 +2 


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A number written only in words. Example: four thousand, six hundred, fiftyone. 


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One part of 100 equal parts of whole. 


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Definition
One of ten equal parts of a whole. 


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A dot used to seperate dollars from cents or ones from tenths in a number. 


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A mental math method used to rewrite a number as the sum of numbers to form an easier problem. example: 102 x 3 = (100 x 3) + (2 x 3) = 300 + 6 = 306 


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Definition
Adding and subtracting the same number to make the sum or difference easier to find. 


Term
Associative Property of Addition 

Definition
Addends can be regrouped and the sum (answer) remains the same. Example: 3 + 2 = 2 + 3 


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Definition
Counting up from the smaller number to find the difference of the two numbers. Example: 16  9= ___1_2__3__4_5__6_ 7_ 9 10 11 12 13 14 15 16 169=7 


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Identity Property of Addition 

Definition
The sum, answer, of any number and zero is that number. Example: 5 + 0 = 5 9 + 0 = 9 


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Cummutative Property of Addition 

Definition
Numbers can be added in any order and the sum remains the same. 


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Definition
Two operations that undo each other. Addition and subtraction are inverse operations. Multiplication and division are inverse opoerations. 


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Definition
A way of displaying objects in rows and columns. 5 x 4 = X X X X X X X X X X X X X X X X X X X X 


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Definition
The product of any two hole numbers 


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Definition
The answer to a multiplication problem. 


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Definition
The numbers multiplied together to find a product. example: 3 x 6 = 18 3 and 6 are the factors. 


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Identity Property of Multiplication 

Definition
The product of any number and one is that number. Example: 5 x 1 = 5 


Term
Commutative Property of Multiplication 

Definition
Numbers can be multiplied in any order and the product remains the same. 


Term

Definition
Breakng apart problems into two simplier problems. Example: 3 x 21= (3x20) + (3x1) = 


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Zero Property of Multiplication 

Definition
The product of any number and zero is zero. example: 1000 x 0 = 0 55 x 0 = 0 


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Definition
The number to be divided in a division problem. example: 40 divided by 4 = 10 40 is the dividend 


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Definition
The number that results from the division of one number by another number. Example: 40 divided by 4 = 10 10 is the quotient. 


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Definition
The number by which another number is divided. example: 40 divided by 4 = 10 4 is the divisor. 

