Wednesday, November 30, 2011

Tinille's Textbook Scribe Post (4,8,12)

4. Answer the following using mental math.

a. 20% of 60

- To get 20% of 60, I divided 100 to 5 (100/5) and I got 20. I did the same thing to the other one, so I divided 60 to 5 (60/5) and I got 12. The answer for 20% of 60 is 12.

b. 250% of 400

- To get 250% of 400, I multiplied 100 to 2
(100 x 2) and I got 200. I just have to get 50% so, I divided 100 to 2 (100/2) and I got 50. I did the same thing to the other side. I multiplied 400 to 2 ( 400 x 2) and I got 800. Then, I divided 400 to 2 ( 400/2) and I got 200. The answer for 250% of 400 is 10 000 (ten thousand).

c. 10 1/2 % of 100

-To get 10 1/2 % of 100, I divided 100 to 10 (100/10) and I got 10. Then I divided 10
to 10 (10/10) to get 1. After that I divide 1 to 2 (1/2) to get 0.5 . I did the same thing to the other side so, I divided 100 to 10 (100/10) and I got 10. Next, I divided 10 to 10 (10/10) to get 1. Then, I divide 1 to 2 (1/2) to get 0.5 . The answer for 10 1/2% of 100 is 10.5 .

8. The original price of a jacket was \$ 84.00. A store manager marked the price down by 25 1/2%. By how much was the price reduced?

One Way:

- To get 25 1/2 of \$ 84.00, I divided 100 to 4 (100/4) and I got 25. Then, I divided 25 to 25 (25/25) and I got 1. I just have to find 0.5 so, divided 1 to 2 (1/2) and I got 0.5. I did the same thing to the other side so, I divided \$ 84.00 to 4 (\$ 84.00/4) and I got \$ 21.00. Then, I divided \$21.00 to 25 (\$21.00/25) and I got \$0.84 so, I divided \$ 0.84 to 2 (\$0.84/2) and I got \$ 0.42.The answer for 25 1/2% of \$ 84.0
0 is \$ 21.42.

Second Way to find 25 1/2 of \$ 84.00

-To get 25 1/2 of \$ 84.00, I made 25 1/2 to a decimal so its 25.5 out of 100. Then, I divide 25.5 to 100 (25.5/100) and I got 0.255. Then, I did the same thing to 100 so, I divided 100 to 100 (100/100) and I got 1 because all decimals are out of 1. Next, I multiplied 0.255 to \$ 84.00 ( 0.255 x \$84) and I got \$ 21.
42.

2. A manufacturer of electric hybrid vehicles claims its vehicle will travel 200% as far as its regular vehicle on a full tank of gas. If the regular vehicle travels an average of 550 km on a full tank, how far will the hybrid go?

One Way:

- To get 200 % of 550 km, I multiplied 100 to 2 ( 100 x 2) and I got 2oo. Then I did the same
thing to the other side so, I multiplied 550 km to 2 ( 550 km x 2) and I got 1100 km. The
answer for 200% of 550 km is 1100 km.

Second Way:

-To get 200% of 550 km, we have to make it a decimal , so I divided 200/100 and I got 2. Then, I divided 100/100 to get one because all decimals are out of 1. Next is, I multiplied 2 to 550 km
( 2 x 550) and I got 1100 km.

Sorry I tried to put colours in but i dont now what happened. It didnt work! D:
I hoped my scribe post helped you! :D

1. Wow, good job Tinille! I liked how you had pictures that explained the questions and how you got them, and not just put the answers down, it was really helpful. I also liked how you had some words bolded, but next time you might also want to put some color so it can "stand out" a little more, but I understand because sometimes the colors don't work on my posts either. I also liked your video and game that you had, I found it very helpful! Good job, again Tinille! Keep it up! (:

3. Awesome Tinille! I liked how your pictures were printed neatly and the pictures show that you understand it well. I also like how some of your words or sentences are bolded but next time you might want to make your fonts more colourful but good job though :)

4. Hi Tinille. I really like your scribe pos. I like how that you explained it really well and used pictures to do i. I like that you drew the picture instead. The game and video you got was great. It really helped me. Your scribe post was so long that it even made it better. You should bolden the answers for people to know what the answer is.
GOOD JOB TINILLE

5. Hey Tinille great job on the scribe post. I like how you made your post and pictures easy to understand also how you added the questions to let us know what it was. Great Job Tinille