## Cegah Corona

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## My Blog List

### How to Study Strategies for Every Learning Style

For example, visual learners sometimes struggle during essay exams because they can't recall test material that was presented orally during class. However, if the visual learner uses a visual aid when studying, like a colorful outline of test materials, he or she may retain more information. Read on to discover the characteristics of and ideal learning strategies for each learning style.

## Visual Learner Characteristics

Visual learners are those who learn through seeing. Visual learners typically share the following characteristics:

• Good at spelling, but forgets first names
• Find quiet study time beneficial
• Enjoy colors and fashion
• Dream in color
• Understand visual elements and charts
• Able to learn sign language easily

Learning Suggestions for Visual Learners

• Draw a map of events in history or draw scientific process.
• Make outlines of reading assignments.
• Copy what's on the board.
• Diagram sentences.
• Use flashcards.
• Take notes and make lists.
• Watch videos.
• Mark up your notes with highlighters, underlines, and color coding.

Test Types for Visual Learners

• Best test type: Diagram activities, map reading, essay tests, demonstrating a process.
• Worst test type: Listening tests

## Auditory Learner Characteristics

Auditory learners are those who learn best through hearing. They typically share the following characteristics:

• Like to read out loud
• Unafraid to speak up in class
• Good at giving explanations and oral reports
• Remember names
• Notice sound effects in movies
• Enjoy music
• Able to follow spoken directions
• Struggle to stay quiet for long periods of time
• Focused in study groups

Learning Suggestions for Auditory Learners

• Use word association to remember facts
• Record lectures
• Watch videos
• Repeat facts with eyes closed
• Participate in group discussions
• Use audio for language practice

Test Types for Auditory Learners

• Best test type: Oral exams and writing responses to lectures.
• Worst test type: Reading passages and writing answers in a timed test.

## Kinesthetic Learner Characteristics

Kinesthetic learners are those who learn through hands-on experience. Kinesthetic learners typically share the following characteristics:

• Good at sports
• Can't sit still for long
• May have sloppy handwriting.
• Learn well through lab and modeling activities
• Study with loud music
• Enjoy adventure books and movies
• Fidgety during lectures

Learning Suggestions for Kinesthetic Learners

• Study in short blocks
• Take lab-based classes
• Act out your study notes
• Take field trips to reinforce knowledge
• Study in groups
• Use flashcards and memory games

Test Types for Auditory Learners

• Best test type: Short definitions, fill-in-the-blank questions, and multiple choice.
• Worst test type: Essay tests and any overly long tests
Source : https://www.thoughtco.com

### Why Mathematics is Very Difficult For Some Students

In 2005, Gallup conducted a poll that asked students to name the school subject that they considered to be the most difficult. Not surprisingly, mathematics came out on top of the difficulty chart. So what is it about math that makes it difficult? Have you ever wondered?

Dictionary.com defines the word difficult as:

“...not easily or readily done; requiring much labor, skill, or planning to be performed successfully.”

This definition gets to the crux of the problem when it comes to math, specifically the statement that a difficult task is one that is not “readily” done. The thing that makes math difficult for many students is that it takes patience and persistence. For many students, math is not something that comes intuitively or automatically - it takes plenty of effort. It is a subject that sometimes requires students to devote lots and lots of time and energy.

This means, for many, the problem has little to do with brainpower; it is mostly a matter of staying power. And since students don't make their own timelines when it comes to "getting it," they can run out of time as the teacher moves on to the next topic.

## Math and Brain Types

But there is also an element of brain-style in the big picture, according to many scientists. There will always be opposing views on any topic, and the process of human learning is subject to ongoing debate, just like any other topic. But many theorists believe that people are wired with different math comprehension skills.

According to some brain science scholars, logical, left-brain thinkers tend to understand things in sequential bits, while artistic, intuitive, right-brainers are more global. They take in a lot of information at one time and let it "sink in." So left-brain dominant students may grasp concepts quickly while right-brain dominant students don’t. To the right brain dominant student, that time-lapse can make them feel confused and behind.

## Math as a Cumulative Discipline

Math know-how is cumulative, which means it works much like a stack of building blocks. You have to gain understanding in one area before you can effectively go on to “build upon” another area. Our first mathematical building blocks are established in primary school when we learn rules for addition and multiplication, and those first concepts comprise our foundation.

The next building blocks come in middle school when students first learn about formulas and operations. This information has to sink in and become “firm” before students can move on to enlarge this framework of knowledge.

The big problem starts to appear sometime between middle school and high school because students very often move on to a new grade or new subject before they’re really ready. Students who earn a “C” in middle school have absorbed and understood about half of what they should, but they move on anyway. They move on or are moved on, because

1. They think a C is good enough.
2. Parents don’t realize that moving on without a full understanding poses a big problem for high school and college.
3. Teachers don’t have time and energy enough to ensure that every single student understands every single concept.

So students move to the next level with a really shaky foundation. The outcome of any shaky foundation is that there will be a serious limitation when it comes to building and real potential for complete failure at some point.

The lesson here? Any student who receives a C in a math class should review heavily to make sure to pick up concepts they'll need later. In fact, it is smart to hire a tutor to help you review any time you find that you've struggled in a math class!

## Making Math Less Difficult

We have established a few things when it comes to math and difficulty:

• Math seems difficult because it takes time and energy.
• Many people don't experience sufficient time to "get" math lessons, and they fall behind as the teacher moves on.
• Many move on to study more complex concepts with a shaky foundation.
• We often end up with a weak structure that is doomed to collapse at some point.

Although this may sound like bad news, it is really good news. The fix is pretty easy if we’re patient enough!

No matter where you are in your math studies, you can excel if you backtrack far enough to reinforce your foundation. You must fill in the holes with a deep understanding of the basic concepts you encountered in middle school math.

• If you’re in middle school right now, do not attempt to move on until you understand pre-algebra concepts fully. Get a tutor if necessary.
• If you’re in high school and struggling with math, download a middle school math syllabus or hire a tutor. Make sure you understand every single concept and activity that is covered in middle grades.
• If you’re in college, backtrack all the way to basic math and work forward. This won’t take as long as it sounds. You can work forward through years of math in a week or two.

No matter where you start and where you struggle, you must make sure you acknowledge any weak spots in your foundation and fill the holes with practice and understanding!

Source : https://www.thoughtco.com/

### Perkalian Bentuk Aljabar Soal dan Pembahasan Penting (Kelas 7 SMP)

Kali ini kita belajar mengalikan operasi bentuk aljabar dengan mengikuti hukum distributif.

Contoh 1

Kalikan x3(x4 + 5a)

Jawab

Kita perluas dengan hukum distributif

x3(x4 + 5a)

x7 + 5ax3

Kita sudah tidak dapat menyederhanakan lagi.

## Contoh 2

Kalikan (x + 5)(a − 6)

Jawab

Uraikan hasilnya sebagai berikut :

(x + 5)(a − 6)

x(− 6) + 5(a − 6)

= ax − 6x + 5a − 30

Sudah tidak dapat disederhanakan kembali. Selesai sampai di situ.

## Contoh 3

Kalikan (2x + 3)(x2 − x − 5)

Jawab

Kita kalikan dengan memecah

(2x + 3)(x2− x − 5)

= (2x)(x2 − x − 5) + (3)(x2 − x − 5)

= (2x3 − 2x2 − 10x+ (3x2 − 3x − 15)

= 2x3 + x2 − 13x − 15

Kita jumlahkan dengan melepas kurung.

−2x2 + 3x2 = x2

dan

−10− 3x = −13x

## Contoh 4

Kalikan $\displaystyle{\left({x}-{3}\right)}^{2}$

Jawab

(x − 3)2

= (x − 3)(x − 3)

x(x − 3) − 3(x − 3)

x2 − 3x − 3x + 9

x2 − 6x + 9

## Catatan penting:

$\displaystyle{\left({x}-{3}\right)}^{2}$

tidak sama dengan

$\displaystyle{x}^{2}-{9}$

Contoh 5

Sedrerhanakan 5x[−4 + 10(x − y)] + 7x

Jawab

5x[−4 + 10(x − y)] + 7x

= 5x[−4 + 10x − 10y] + 7x

= −20x + 50x2 − 50xy + 7x

= −13x + 50x2 − 50xy

## Contoh 6

Sederhanakan (p − 1)(c − 1) + 2

Jawab

p(c − 1) − 1(c − 1) + 2

pc − p − c + 1 + 2

pc − p − c + 3