4th Grade Math Week of Sept. 26th-30th
This week we are learning addition properties and subtraction rules, along with estimating sums and differences. As a reminder 4th grade math students should be bringing home a short math homework page every night, except Friday.
This weeks Math Vocabulary with examples
Associative Property of Addition: this property states that the way in which numbers are grouped when added does not change the sum (5 + 8) + 2 = 5 + (8 + 2)
Commutative Property of Addition: this property states that the order in which the numbers are added does not change the sum 6 + 1 = 1 + 6
Identity Property of Addition: this property states that the sum of any number and zero is the number 8 + 0 = 8
Difference: the answer to a subtraction problem The difference of 8 - 2 is 6.
Sum: the answer when you add numbers The sum of 4 + 5 is 9.
Estimate: a number close to an exact value; an estimate indicates about how much 47 + 22 is about 50 + 20 or 70
Round: to change the value of a number to one that is easier to work with; to find the nearest value of a number based on a given place value 6,897 rounded to the nearest thousand is 7,000