1. & GUIDED QUESTIONS MATH VOCABULARY DAY 14

3. Table of ContentsDatePage 9/25/12 Math Vocabulary27 Guided Question28

5. commutative property of addition – A property (rule) of mathematics that states 27 MATH VOCABULARY 9/25/2012 changing the order of the numbers you add (the addends) does not change the sum. identity property of addition – A property (rule) of mathematics that states the sum of any number and zero is the original number. associative property of addition – A property (rule) of mathematics that states when three or more numbers are added, the sum is the same regardless of the grouping of the numbers you add (addends). 4 + 2 = 2 + 4 5 + 0 = 5

6. associative property of addition – A property (rule) of mathematics that states when three or more numbers are added, the sum is the same regardless of the grouping of the numbers you add (addends). (2 + 3) + 4 = 2 + (3 + 4)

8. closest ten13 C commutative property of addition27

9. I inverse19 identity property of addition27

10. associative property of addition A approximate9 about11

12. 9/25/2012 28 Guided Question

13. Question of the Day: There were 1,455,268 people living in Weston in 1990. In the year 2000 there were 1,426,599 people. How many more people were living in Weston in 1990 than in 2000?

14. Work out the problem. Then in 3 – 4 sentences explain how you got your answer.

15. 9/25/2012 28 There were 1,455,268 people living in Weston in 1990. Guided Question In the year 2000 there were 1,426,599 people. How many more people were living in Weston in 1990 than in 2000? We want to find the difference between two HUGE numbers. Difference is the answer you get when you subtract (-). So we will be subtracting for this problem.

16. My answer is 28,669. We want to find the difference between two HUGE numbers. Difference is the answer you get when you subtract (-). So we will be subtracting for this problem. 1, 4 5 5, 2 6 8 1, 4 2 6, 5 9 9 518 9 1 15 6 4 11 6 4 14 82,

17. Do not forget that your MATH JOURNAL is a valuable tool in the 4 th Grade. Make sure you are following along and copying down what is important. DO NOT MISPLACE IT.