Rounding with Decimals

Today we reviewed rounding and then applied the skill to decimal values.  Examples from class as well as the homework below:

Homework:

Still feeling stuck?  Check out this video to help you!

I had hoped to play this game in class, but it wouldn't work on my computer...  If you get a chance, enjoy this game from the BBC on rounding.  Hopefully it works for you at home!

-Miss K  :)

Rounding with decimals

Remember rounding?

Some notes and examples on rounding decimals:

Tonight's Homework:

Two games that you can play to practice rounding with decimals!

Funny BBC game that wouldn't work in class.

Baseball game.

Have a good night!

-Miss K  :)

Rounding Decimal Values

Today we rounded decimal values.

Tonight's homework is to complete both sides of worksheet 3-2.  You can also play the silly "Rounding Off" game that we played in class here!

-Miss K  :)

Review Assignment

I had hoped to have the test on Friday of next week, but due to various scheduling issues, it will be Wednesday, May 30th instead.  Be sure to start reviewing Order of Operations, Exponents, Scientific Notation so you will be prepared.  Many of you have suggested or shared that you want to bring your grades up...  Remember, you are the only one that can do that!  Do your homework, ask questions, and practice when you study!

This weekend, you need to complete the review assignment that I handed out in class.  There is a lot on it and it can be a bit confusing, but I know that if you take your time and work carefully, you should be fine.  Feel free to use a calculator!

Quick reminders:





Need more help?  Look on the left hand column of the blog and find the "Tag Cloud."  Select the topic that you need help with and you will be taken to a version of the blog with posts on that topic.  For example, THIS is the rounding section.

Good Luck!  Work hard!  We will review on Monday!

-Miss K  :)

Word problem review today!

Great job on the word problems today in class!  As I mentioned, you should use that worksheet to help you prepare for the test.  The word problems on the test will be similar to the ones that you saw today.

As you worked on the study guide, I noticed that some people were having some difficulty with estimation.  To help, please review below and/or visit my original post on estimation.

Adding and Subtracting:  Estimate by round each number to the highest COMMON place value.  Basically round both numbers to the biggest place value that they BOTH have.

ex:  17.92 + 182.034
since both numbers have a digit in the tens place (underlined), we would round to the tens.

20 + 180 = 200

Multiplying:  Estimate by rounding EACH number to its OWN highest place value.  Basically, use as many zeros as possible!

ex:  5.67 x 41.08376
round the first number to the ones place and the second number to the tens place

6 x 40 = 240

Dividing:  Estimate by using compatible numbers.  Round the divisor first and then search for a compatible number for the dividend.

ex:  41.03 / 7.15
round the 7.15 to 7 and then think about multiples of 7.  Since 42 is a multiple of 7 and is reasonably close to 41.03, we round it to 42.

42 / 7 = 6

I'd also encourage you to practice rounding decimal values.  Check out this game to practice.  Or this one!

I'll put more on the blog tomorrow, but spend some time with these topics tonight.

Tonight's homework is to review for the test.  The study guide (click link to view and print a Google doc of the study guide) is due Thursday.  I will also provide you with an optional, additional study guide on Thursday which you can complete and check answers online.

Thanks for your hard work today!  Keep it up and study hard!

-Miss K  :)

Rounding Decimals!

Rounding Decimal Numbers

hundreds	tens	ones		tenths	hundredths	thousandths	ten-thousandths	hundred-thousandths	millionths	ten-millionths
	3	4	.	0	5	9	2

How do we round a decimal number?  Let’s use an example to help illustrate the process…

Example:  Round 34.0592 to the nearest hundredth.  (The number is written in chart.)

Step 1:  Identify the place value that we are rounding to and place a square around that digit.

              34.0592

Step 2:  Look at the digit to the right of the boxed number and determine if the number is a low number or a high number.

               34.0592                                                           low numbers  high numbers

                                                                                         0   1   2   3   4      5   6   7   8   9

Step 3:  If the number to the right is a low number, the boxed number stays the same.  If the number to the right is a high number, the boxed number is rounded up one.

                                                                                                                9 is a high number, so we change

34.0592                                                        the 5 into a 6

Step 4:  Drop all the digits to the right of the boxed number. 

                34.06

Tonight's homework is to complete both sides of the rounding worksheet.  You should have come close to finishing during class!

Want to practice?  Try playing this game!

Have a great weekend!  Enjoy the snow if it comes!

-Miss K  :)