Operations, Expressions, and Variables
The whole numbers are the counting numbers and 0. The whole numbers are 0, 1, 2, 3, 4, 5, ... and so on.
The position, or place, of a digit in a number written in standard form determines the actual value the digit represents. Read more about place value
The expanded form of a number is the sum of the values of each digit of that number. Read more about the expanded form
To round to the nearest ten means to find the closest number having all zeros to the right of the tens place. Read more on how to round whole numbers
The commutative property of addition says that we can add numbers in any order. The commutative property
Both addition and multiplication can actually be done with two numbers at a time. So if there are more numbers in the expression, how do we decide which two to " associate " first? The associative property
The distributive property comes into play when an expression involves both addition and multiplication. A longer name for it is, "the distributive property of multiplication over addition." Read more about the distributive property
Adding 0 to a number leaves it unchanged. We call 0 the additive identity.
Example:
88 + 0 = 88
Multiplying any number by 0 gives 0.
Example
88 × 0 = 0
0 × 1003 = 0
IDENTITY PROPERTY
The identity property for addition tells us that zero added to any number is the number itself. Read more on the identity property
The order of operations defines the order in which expressions with multiple operators (e.g. multiplication, addition) should be computed. The order of operations
Variables and expressions
A variable is a symbol that represents a number. Read more about variables and expressions
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