Add & Subtract decimals and Order & Compare Decimals:8/23/10 to 8/27/10

This week we will be working on two SPI's and then we will test on Friday. Today we will add decimals, tomorrow subtract decimals, Wednesday order decimals, Thursday compare decimals, and test Friday.

This week's SPI's are:
5.2.5 Solve addition and subtraction problems involving both fractions and decimals.
Tips: The MOST important step is to LINE up the decimals and numbers to ensure proper adding and subtracting is going on! Don't forget to carry and borrow as needed!

5.2.9 Compare whole numbers, decimals and fractions using the symbols < (less than) , > (greater than), and =.
Tips: The MOST important step is to LINE up the decimals and numbers to ensure proper comparison between decimals. Children often want to say that since there are more numbers on the decimal side that it automatically makes it the decimal bigger. That is not the case with decimals.

Sample Problems:

Add Decimals
      1.592   
+ 22.173
   23.765

Subtract Decimals
  14.59
-10.03
    4.56


Ordering Numbers:

Greatest ---> Least  12.9, 12.7, 11.4, 10.2, 10.1, 9.0

Least --> Greatest 1.5, 1.52, 1.6, 2.3, 2.31, 3, 4.5

Comparing Numbers:

3.99999999999999 < 4
0.9999999 <1
9.97654 > 9.97653
0.4= 0.40


Please go to links for 1st Nine Weeks to find games and worksheets to help with this week's lesson/skills! Or here is a link to it for you!
Click for Games & Help On This SPI Lesson!
 Please let me know if you or your child is using this site. I would love the feedback.


Signing off, Mrs. Burger :-)