Shadowing Practice: Math Antics - Finding A Percent Of A Number - Learn English Speaking with Video
בחר מצב תרגול
כל מצב פותח חדר תרגול במסך מלא.
78 משפטים
אם המשפטים קצרים או ארוכים מדי, לחץ על ערוך כדי להתאים אותם.
1
Hi and welcome to Math Antics.
2
In today’s video, we’re gonna learn how to do one of the most common calculations with percentages.
3
We’re gonna learn how to find a percent of a number.
4
But what does that even mean?
5
Do numbers have percents that they hide somewhere and then we have to go looking for them like a game of hide and seek?
6
Gottch ya! Umm - not exactly.
7
Finding a percent of a number makes more sense if you remember that a number just represents an amount and that a percent is really just a fraction.
8
So finding a percent of a number really means finding a fraction of an amount.
9
Think about it this way… Let’s say the number 20 represents an amount, like the amount of lady bugs that you found at the park one day.
10
And let’s also imagine that you agreed to give 25% of all the lady bugs you found to your little sister.
11
Okay then, so how many is that?
12
If you have 20 lady bugs, how many is 25% of that amount?
13
That’s what it means to find a percent of a number.
14
You’re finding out how much that percent (or fraction) of the total is.
15
In this case, since our total is 20, we need to know what 25% of 20 is.
16
So how do we figure that out?
17
Well, it’s really easy if you remember back to one of our fractions videos; the one about multiplying fractions.
18
In that video, we learned that when dealing with fractions, sometimes the word “of” is used instead of the multiplication symbol.
19
When they say find 1/2 of 16, they really mean find 1/2 times 16.
20
Well guess what… Since a percent is just a special fraction… “of” means the exact same thing with percents that it did with fractions.
21
When we have 25% of 20, that means the same as 25% times 20.
22
Great! So all we have to do to find a percent of a number is to multiply.
23
But how do we multiply a percent and a number together?
24
Do we just forget about the percent sign and multiply the numbers together?
25
No! If we did it that way, our answer would be WAY too big.
26
25% should be a smaller part (or fraction) of 20 lady bugs.
27
But if we did 25 times 20, we’d get 500 lady bugs!! Clearly that’s not the right answer!
28
Here’s what we have to do instead...
29
Remember that when you see a percent written like this with the percent sign, it’s an abbreviation for a fraction; in this case, 25 over 100.
30
So we need to use that fraction form when we multiply since we’re really multiplying by a fraction.
31
Now some of you may also remember that percents have a decimal form. We’ll get to that in just a minute.
32
Okay then, if we use the fraction form of our percent, then our problem becomes: 25/100 times 20.
33
Now that’s a problem we know how to do.
34
To multiply fractions, we just multiply the top numbers, and then we multiply the bottom numbers to get the answer.
35
And we can just write 20 as a fraction by putting a 1 as the bottom number, because 20 over 1 is the exact same value as 20.
36
So, let’s go ahead and multiply.
37
On the top, we have 25 × 20 which gives us 500.
38
And on the bottom, we have 100 × 1 which is just 100.
39
So our answer is 500 over 100.
40
Now 500 over 100 might seem like a strange answer, but that’s just because we still need to simplify it.
41
500 over 100 simplifies to 5 over 1, and 5 over 1 is just 5.
42
That’s much better. So, 25% of 20 is 5.
43
Alright, so to find a percent of a number, we just need to multiply the fraction form of the percent by the number and we have our answer.
44
But, there’s another slightly different method that you can use that works especially well if you’re allowed to use a calculator.
45
In our first percentages video, we learned that percents have both a fraction form and a decimal form.
46
We’ve already seen how we can use the fraction form to find a percent of a number, but we can also use the decimal form if we want to instead.
47
The procedure starts the same. If you need to find 25% of 20, you first replace the word “of” with the multiplication symbol.
48
Next, we’ll replace the percent, but with its decimal form this time. 25% is the same as the decimal 0.25 Then, all we have to do is multiply.
49
And although I could easily do the decimal multiplication by hand, I happen to have a calculator, so I’m gonna use it.
50
I just enter 0.25 × 20, hit equals, and I get 5.
51
Yep - That’s the same answer we got when we used the fraction form of 25%. Oh Yeah!
52
So that’s how you find a percent of a number. You just multiply the number by either the fraction form OR the decimal form of the percent.
53
Either way will give you the right answer, so you can choose whichever will be easier for you to do.
54
Let’s see a couple more examples before you practice on your own.
55
This next one involves money.
56
Pretend that your best friend has a job walking dogs and offers to give you 35% of whatever he earns if you help walk some of the dogs.
57
If your friend earns $80 that week, how much of the money will you get?
58
In other words, you need to figure out what 35% of 80 is.
59
Okay then, let’s start by replacing the “of” with the times symbol.
60
And next we have to decide if we want to replace the percent with its fraction form or its decimal form.
61
I think I’ll use the decimal form for this one which means I'll replace the 35% with 0.35 Now, all we have to do is multiply 0.35 times 80, and that’s 28.
62
That means you’ll get 28 dollars if you help your friend walk those dog.
63
Cha-ching! Okay then… In the last two problems, we found a percent of a number, which, like we learned at the beginning of the video, just means finding a fraction of an amount.
64
And like you’d expect when finding a fraction of something, the answer was smaller than the amount we started with.
65
But remember, fractions can be ‘improper’ too which means that their value is greater than 1.
66
And in the same way, percents can be greater than 100%. So you might come across situations like this… Suppose that last year, your school had 400 students, but this year it has 120% of that amount.
67
Well, 100% would mean the exact same number of students as last year, so 120% must mean that there’s more students now, but how many students?
68
To find out, we need to calculate what 120% of 400 is.
69
Great, we know just how to do that.
70
We just multiply 400 by the fraction form OR the decimal form of 120%.
71
Let’s use the decimal form again.
72
To get the decimal form of 120%, we move the decimal point over 2 places to the left, and we get 1.20 So we multiply 1.20 times 400 which gives us 480.
73
So this year there’s 480 students at school.
74
Alright then, that’s how you find the percent of a number.
75
And it’s a really useful math skill that has a LOT of real-life applications so it’s important to learn how to do it right.
76
As always, the best way to learn math is to practice on your own.
77
Thanks for watching Math Antics, and I’ll see ya next time.
78
Learn more at www.mathantics.com
הורד אפליקציה
כל מה שאתה צריך כדי לדבר בשטף
הגיית AIציון לכל משפט
תרגול IPAשלוט בכל צליל
אוצר מיליםבנה את מאגר המילים שלך
משחק אוצר מיליםלמד תוך כדי משחק
אותו ערוץ
B2Extras ArcLength YouTube
American AccentHigh School StudentsUniversity Students
B14
Math Antics - Negative Numbers
American AccentKidsDaily Conversation
B1Math Antics - Calculating Percent Change
American AccentBusiness EnglishHigh School StudentsUniversity Students
B1Math Antics - Percents Missing Total
American AccentHigh School Students
B1Math Antics - What Percent Is It?
American AccentDaily ConversationHigh School StudentsUniversity Students
B1Math Antics - Percents And Equivalent Fractions
American AccentDaily ConversationHigh School StudentsUniversity Students
B1Math Antics - What Are Percentages?
American AccentHigh School StudentsUniversity Students
FOR YOU
המלץ על סרטון
B12
101 משפטים
Steve Harvey Meets His Match with a 7-Year-Old Math Genius | Little Big Shots
KidsTeensDaily Conversation
B15
325 משפטים
1,000 Ants vs. Obstacles!
KidsTeensDaily Conversation
A215
12 משפטים
Grade 5- unit 7- lesson 2
KidsTeensDaily Conversation
B156
62 משפטים
B1 English Listening Practice - Tipping
American AccentTravel EnglishTeensDaily Conversation
B1137 משפטים
Multiplying Fractions - The Easy Way!
American AccentHigh School StudentsUniversity Students
A21
23 משפטים
What is Matter?
KidsTeensHigh School Students
A21
140 משפטים
1 - 100 English Numbers | Learn and Practice Pronunciation and Spelling
KidsTeensDaily Conversation
B150 משפטים
How to Find Area and Perimeter | Educational Rap for Math Curriculum
KidsTeensHigh School Students
A211
13 משפטים
For beginners| One story a day| Book 2 - 7 Numbers 4 You
KidsTeensDaily Conversation
B213
270 משפטים
GENIUS Girl Tells Others They're DUMB, What Happens Next Is Shocking | Dhar Mann Studios
American AccentKidsTeensDaily Conversation
Why practice speaking with this video?
The video "Math Antics - Finding A Percent Of A Number" offers a unique opportunity for english speaking practice within a mathematical context. By engaging with the material, learners can enhance their vocabulary and fluency while discussing topics that might typically be outside everyday conversation. This makes the shadowing technique particularly effective, enabling viewers to mimic the natural rhythm and tone of the speaker. As you practice, you’ll not only internalize the content but also improve your confidence in speaking about math-related subjects in English.
Grammar & Expressions in Context
In the transcript, several key grammar structures and expressions are used that can aid learners in expanding their English speaking skills:
- Percent as a Fraction: The speaker frequently refers to percentages as fractions, as in “25% is just a special fraction.” This highlights how mathematical concepts can be communicated using simple English terms, an essential skill for learners.
- Using "of" in Multiplication: Phrases like “find 25% of 20” demonstrate how "of" can imply multiplication. This is a valuable structure to grasp, as it denotes relationships in various contexts, making it easier for learners to navigate different subjects in English.
- Conditional Statements: The use of conditional phrasing, such as “if we did it that way,” allows learners to explore cause and effect in conversation. Understanding this structure can enhance the ability to form complex sentences in discussions.
Common Pronunciation Traps
While watching the video, learners may encounter several pronunciation challenges, particularly with numbers and mathematical terms. Here are some points to consider:
- Percent: Referring to "percent" can be tricky; ensure to stress the second syllable, making it sound like "per-CENT." Practicing the word within the context of sentences can help solidify this understanding.
- Fraction: The word "fraction" could be mispronounced as "frak-shun" instead of "frak-tion." Focus on the "tion" ending to pronounce it correctly.
- Amounts: The term "amount" may be confused with "a mount." Emphasizing the two syllables and the "mount" can clarify this common misunderstanding.
By incorporating these elements into your shadow speak practice, you can effectively improve your speaking proficiency. Utilize the learn English with YouTube approach to reinforce your skills through repetition and mimicry of the speaker’s pronunciation and rhythm. Happy practicing!
דקדוק בסרטון הזה
המבנים שהדובר משתמש בהם הכי הרבה, עם המילים המדויקות מהסרטון:
| מבנה | בסרטון |
|---|---|
| משפטי תנאי (Conditional sentences) if + clause, will/would + verb — תנאי ותוצאה שלו | if we did 25 times 20, we'd get |
| משפטי זיקה (Relative clauses) who / which + clause — מידע נוסף על אדם או דבר | one which means · too which means |
| אפשרות עם “might / may” might/may + verb — משהו שיכול לקרות, אך לא בטוח | may also remember · might seem · might come |
| השוואות (Comparatives) -er than / more … than — השוואה בין שני דברים | smaller than · greater than |
מהי טכניקת השאדואינג?
שאדואינג היא טכניקת למידת שפה מבוססת מדע שפותחה במקור להכשרת מתורגמנים מקצועיים ופופולרית על ידי הפוליגלוט ד"ר אלכסנדר ארגואלס. השיטה פשוטה אך עוצמתית: אתה מקשיב לאודיו באנגלית ילידית וחוזר עליו בקול רם מיד — כמו צל העוקב אחרי הדובר עם עיכוב של 1–2 שניות בלבד. בניגוד להאזנה פסיבית או תרגילי דקדוק, שאדואינג מכריח את המוח והשרירים בפה לעבד ולשחזר דפוסי דיבור אמיתיים בו זמנית. מחקרים מראים שזה משפר משמעותית את דיוק ההגייה, האינטונציה, הקצב, הדיבור המחובר, הבנת השמיעה ושטף הדיבור — מה שהופך אותו לאחת השיטות היעילות ביותר להכנה לIELTS Speaking ולתקשורת באנגלית בעולם האמיתי.