Commutative Property of Addition
the order in which numbers are added does not change the sum- a+b=b+a
Numbers that are close to the given numbers that make estimation or mental calculation easier
Associative Property of Addition
changing the groupings does not change the sum
adjust one number to make computations easier by changing the other number
When a number is larger than the other number. Example 65 > 56
When a number is smaller than the other number. Example 107 < 215
to arrange numbers from least to greatest or greatest to least
A whole number ending with 1, 3, 5, 7, or 9 in the ones place.
A whole number ending with 0, 2, 4, 6, or 8 in the ones place.
a number with only 2 factors....one and itself.
a number that results from muliplyina another number by itself ex. 3 x 3 = 9
the number from multiplication
2 x 3 =6
one of two or more numbers that are multiplied to form a product
counting by numbers. Example: the multiples of 6 are: 6, 12, 18, 24......
A whole number greater than 1 that has more than 2 factors.