Assignment for Thursday, 11/21

Hello my friends. First, let me thank you for your kind words and support today. You all helped me get through the day and I appreciate it. :)

Please watch this video on dividing decimals to prepare for class tomorrow (it's different than the one we watched today). Tomorrow we will be reviewing dividing decimals and will talk about what happens when you have a remainder. See you tomorrow!

https://www.khanacademy.org/math/cc-fifth-grade-math/cc-5th-arith-operations/cc-5th-dividing-decimals/v/dividing-decimal

Decimals Cruncher

Howdy!

Today you'll be playing a team game to practice what we've learned about multiplying with decimals. Display Decimals Cruncher on the Polyvision board (click this link): http://www.coolmath-games.com/decimals-cruncher/decimals-cruncher-multiplication.htm. Be sure to select the "hard" level option when playing the game. Please designate a classmate to keep score on the chalkboard.

Divide your class into two teams. Boys vs. girls worked well last time if you'd like to do that again. Take turns going up to the board to answer the questions with the eno pen. Remember to take a notebook and pencil with you - nooooo calculators!

Team 1 will send a player to the board to complete a problem. Correct answers score 1 point. Incorrect answers score no points. After the first player from Team 1 has gone, Team 2 will send a player to complete a problem. Then Team 1 will send another player, and so on, alternating between your two teams. The team with the most points at the end of the game wins. Have fun!

The rest of 2D

Practice test answers

3-5 Worksheet Answers

Weekend HW 10/4

Greetings, Mathlings!

Today we talked about the "mean", which is a measure of central tendency (it gives us information about a set of data).

Please recall that, to find the mean, you must add all the numbers together and then divide by how many numbers you have:



(Source: Mathplanet.com)

This weekend, please read pg. 77 to learn about outliers. Then complete questions 9-12 and 15-19 on pg. 78 (9 questions total). Happy solving!!!

8/29: Did you find it?

Hey y'all! Hoping you found the blog. If you did, you can opt to do the following problems for a little extra credit (please use your divisibility rules sheet!!! no calculators):

Tell whether each number is divisible by 2, 3, 4, 5, 6, 9, and 10:

1,243

178

500

Tuesday, 3/5

Howdy, y'all.

Today you'll be taking a break from the madness of our Chapter 4 test and working on something a little easier.

Let's talk about GCF. GCF is the "greatest common factor" of two numbers (remember, a "factor" is a number that goes into another number evenly).

You can find the GCF of two numbers using a couple different methods. Today, we will be using the listing method ONLY. Here is an example:

Example:

Find the GCF of 30 and 18.

If we list the factors of 30, we get: 1, 2, 3, 5, 6, 10, 15, and 30.

If we list the factors of 18, we get: 1, 2, 3, 6, 9, and 18.

When we compare the two lists, we see that the greatest common factor shared by both of them is 6.

Read through Example 1 on your packet, skip Example 2, and complete 1 - 12. IGNORE THE DIRECTIONS ON THE PAGE AND USE ONLYYYYYY THE LISTING METHOD! We will be covering the other method next time. Then, SKIP the second page of the packet and complete the math puzzle with NO calculators. Turn in whatever you finish.

 

Have a math-tabulous day!!!

Wednesday, Feb. 20th

Hello all:
Here are the answers to yesterday's work. Please check your answers and turn your work back in.

(Click the image to make it larger)

Use today's class to go through the answers you got wrong and try to figure out what happened. Please be sure to use the examples on the right-hand side of the page - they are great references. 

If you're finished checking your answers and you're comfortable with moving forward, move on to pg. 168, 43 - 53. 

Thursday 2/14

Happy Valentine's Day!!!

Please check your work from yesterday:

P.S. - Did anyone get snow last night? I did! :)

Please move on to pg. 167 today. Remember, no calculators. Get through as many as you can, #s 19 - 42. Remember, we're only using calculators for this chapter when we're dealing with perimeter or circumference. Hand in what you have @ the end of class. Have a great weekend!

Wednesday 2/13

Hello, folks. Roscoe is blogging for me today. He says, "If you finished the Chp. 4 practice test yesterday, check your work (click the pic to make it bigger). If not, please finish and then check. Be sure to circle any you got wrong, then turn in to your teacher."

If you haven't already noticed, we are reviewing everything we've learned in Chapter 4. It's been our hardest chapter yet, so please rely on your class notes, previous blog posts, and your textbook for help. 

Today's assignment:

After checking yesterday's work, complete pg. 166, 9 - 18. 

If you finish early, you may move on to pg. 167, 19 - 26. 

Please make sure you are turning all your work in to your teacher. Roscoe says, "Happy Decimal-ing!" :)

Tuesday 2/12

Here are the answers for your circumference packet. Please click on the pictures to enlarge them. Check your work and leave comments for anything you have questions about. *Please note that for a lot of you who handed work in, you used the formula to find Circumference with diameter (d) on questions for which you were given the radius (r). Remember, when given the diameter:

 C = πd 

But when given the radius, the formula changes:

C = 2πd 

This is because the radius of a circle is only half the length of the diameter. So we multiply the formula by 2. 

Circumference concludes Chp. 4 for us. Today's assignment is pg. 169, 3 - 20. You may only use a calculator for 17 - 20; when you take your actual test, you'll be required to show all work for adding, subtracting, multiplying, and dividing decimals. Please turn in your assignment at the end of class. 

Friday's Class

...or will it be Monday's class?! Dun dun DUUUUNNNN... :)

(I wonder if we'll have snow/ice tomorrow?)

Please check your answers for the last page in yesterday's Perimeter packet (pg. 191):

1) About 2,090 km

2) 39 in.

3) 48.5 ft

4) 24 ft

5) 1,840 yd

6) 130.72 in.

7) 43.701 in.

8) 0.916 m

If you had any problems with finding the answer, please leave me a comment below. 

Please turn your packets in (place them in the Inbox). 

Today we're going to be taking a look at Circumference. Circumference is the distance around a circle. Check out this diagram from kidsmathgamesonline.com:

Diameter (d) is the distance a cross a circle through its center. 

Radius (r) is the distance from the center to any point on a circle. 

And, as we said, Circumference (c) is the distance around a circle. 

There's a formula to figure out what the Circumference of a circle is:

C = πd 

This says "Circumference = pi times the diameter"

What is that little symbol? That "pi" thing??? Well, it's not a pie, although I could certainly go for a cherry pie right now. 

tasteofhome.com

Anyway. Pi is a number that we use to find Circumference. Use a calculator to find the real value of pi by pressing the  π  button on your calculator. It goes on forever - so we round it to 3.14. 

Now that we know what pi is, we can find the circumference of any circle as long as we know it's diameter. Let's say we have a circle with a diameter of 4.5 inches. All we need to do is plug the numbers into the formula:

C = 3.14 x 4.5

Then, using your calculator or your multiplying decimal method, solve for C:

C = 14.13

We know that the circumference is 14.13 inches. 

There's another way to find Circumference - this time, using radius. Take a look at the circle diagram above. Did you notice that the radius is exactly half the length of a circle's diameter? So to find the Circumference of a circle using the radius, we use the following formula:

C = 2πr

This says "Circumference equals 2 times pi times the radius of a circle."

Again, all we have to do is plug the numbers in. If we have a circle with a radius of 38 ft, we would plug the numbers in like so:

C = 2 x 3.14 x 38

Now solve for C.

C = 238.64 ft.

Once you know the formulas, and remember that pi = 3.14, you're good to go. 

Please read through the bottom of pg. 161 through pg. 162. Then, using a calculator (or by hand), complete questions 9 - 18 on pg. 163. 

You will be turning this in. Please place in the inbox when finished. 

Have a fantastic weekend everyone!

Thursday's Class

Hey guys! I hope you are all enjoying Raven's Day. Please know that you may begin to use your calculators now until otherwise noted.

Please pair up with a friend and check your answers from yesterday's Perimeter packet. Here are the answers:

pg. 189:
1) 10 in.
2) 26 yd
3) 20 ft

pg. 190:
1) 14 ft
2) 26 in.
3) 16 in.
4) 49.4 yd
5) 39.2 km
6) 22.6 mi
7) 33.6 km
8) 15.4 cm

How'd you do? Leave a comment and let me know. Today's classwork is an individual assignment. Work quietly on the last page in your Perimeter packet (pg. 191) - Word Problems and Perimeter. Hold on to this - you will be checking this tomorrow.

Wednesday's Class

Hello my little Mathbugs. Sorry I can't be with you this week. 

Please take the first few minutes of class to check your work from yesterday's worksheets. The answers are as follows:

pg. 184

1) 7

2) 2.1

3) 23.4

4) 7.21

5) 500

6) 159.9

pg. 185 (Remember, the directions said "round to the nearest hundredth if necessary")

1) 24.3

2) 3.6

3) 12

4) 4.5

5) 3

6) 18

7) 0.21

8) 8.1

9) 1.53

10) 16.51

11) 1.24

12) 4.69

13) 18.12

14) 2.46

15) 4.02

16) 6.39

17) 18.52

18) 16.35

After checking your work, pair up with a friend to see what, if anything, went wrong. Try to help each other out. I have enabled comments on this blog so that you can leave a question for me if you're having a hard time. I know dividing with decimals is tricky, but you can do it!!! Just remember to move the decimals. 

Once you & your partner are finished going over your answers together, ask your substitute for a Perimeter worksheet. Do not lose this - you will be working on it today and tomorrow. You will hand it in tomorrow. Please complete the front and back of the first page today (pgs. 189 and 190). You'll be checking your work tomorrow. Remember to read the Study Guide on the first page if you get stuck on perimeter. For the shapes that are not rectangular - remember that we can add all the sides together to find the perimeter without using a formula. 

Good luck!

Midterm Study Guide

Things to use to study for your midterms (remember, we'll be reviewing in class too): 

- Previous blog posts

- Previous tests 

- The study guides @ the end of the chapter in your book

- Self-check quizzes, Personal Tutor videos, and Extra Examples on Glencoe's website (in your favorites)

What we'll be covering:

Chapters 1 - 4 (stopping halfway through chapter 4; we will only cover up through dividing decimals by a whole number)

Concepts you should know:

Chp. 1

Divisibility Rules: Be able to identify what a number is divisible by and whether it's even or odd

Prime Numbers: Identify prime & composite number (remember, prime means the number is only divisible by 1 and itself

Prime Factorization: Be able to find the prime factorization of a number. Remember, that's when we break down a number into the smaller numbers it's divisible by until we have all prime numbers at the bottom of our factor tree

Powers & Exponents: Be able to write a product using an exponent and vice versa (for example: 5 x 5 x 5 = 5³⁾ 

Order of Operations: Be able to find the value of an expression using PEMDAS
Algebra: Know how to evaluate an expression with a given variable (for example, to evaluate x + 5 for x = 2, substitute 2 for x: 2 + 5 = 7). Also know how to solve an equation mentally (for example, to solve p + 3 =  5, we think to ourselves, "What number plus 3 gives us 5? The answer is 2")
Area of a Rectangle: The formula will be on your test. A = lw (Area equals length times width). For a rectangle with a length of 4 inches and a width of 3 inches, we multiply 4 x 3, and our answer is 12 inches squared.

Chp. 2

Graphs: Know how to construct and read a frequency table, bar graph, line graph, circle graph, and stem & leaf plot

Measures of Central Tendency: Know how to find the mean, median, mode and range of set of data (mean - add all the numbers up and divide by how many you have; median - list them in order and find the middle number or, if there are two middle numbers, the mean of the two middle numbers; mode - number which appears most often; range - to find the range, subtract the lowest value from the highest value)

Chp. 3

Decimals: Know how to write a decimal in word and standard form (take a look @ your place values chart!)

Ordering Decimals: Know how to compare decimal values and order them from least to greatest

Rounding Decimals: Know how to round a decimal to a given place value (for example, to round 52.73 to the nearest tenth, we round to 52.7 since the 3 is "4 or below, so we let it go")

Adding and Subtracting Decimals: Line up the decimals, then add or subtract just like with whole numbers. You can round to estimate before you start so you know you're on the right track when you get your answer.

Chp. 4

Multiplying Decimals by whole numbers: Don't line the decimals up - line the numbers up as though there aren't any decimals. See previous blog post for more detail. Then, solve just like normal whole numbers (you may need to annex zeros), and count how many numbers there are after the decimal. Then place the decimal in your answer the same amount of places from the right. 

Multiplying Decimals by decimals: Same method as above, but remember to count ALL the numbers after the decimals in your problem to determine how many places from the right the decimal will go in your answer. 

Dividing Decimals by whole numbers: First, carry the decimal straight up. Then divide as with regular numbers. *Don't forget, you may need to annex zeros!!! Round to the nearest tenth for each answer (no remainders) - which means you need to solve until the hundredths place to determine the right value for the tenths place