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16 terms

5th grade Number Sense

STUDY
PLAY
Commutative Property of Addition
the order in which numbers are added does not change the sum- a+b=b+a
Compatible Numbers
Numbers that are close to the given numbers that make estimation or mental calculation easier
25+93+75=(25+75)+93
=100=93=193
Associative Property of Addition
changing the groupings does not change the sum
17+(13+10)=(17+13)+10
Compensation
adjust one number to make computations easier by changing the other number
320-190
+10 +10
330-200=130
combined
joined together
greater than
When a number is larger than the other number. Example 65 > 56
less than
When a number is smaller than the other number. Example 107 < 215
ordering
to arrange numbers from least to greatest or greatest to least
odd number
A whole number ending with 1, 3, 5, 7, or 9 in the ones place.
even number
A whole number ending with 0, 2, 4, 6, or 8 in the ones place.
prime number
a number with only 2 factors....one and itself.
square number
a number that results from muliplyina another number by itself ex. 3 x 3 = 9
product
the number from multiplication
2 x 3 =6
factor
one of two or more numbers that are multiplied to form a product
multiple
counting by numbers. Example: the multiples of 6 are: 6, 12, 18, 24......
composite number
A whole number greater than 1 that has more than 2 factors.