## Why Are Negative Numbers Important?

Most of us usually are more familiar with positive numbers than negative numbers, due to its frequency of use in the daily life of experiences. Most of the times, we use positive numbers to represent the quantity of something, but often forget about negative numbers. However, negative numbers have their own importance and advantages.

On a number line, positive integers are counted to the right of the integer 0 and negative integers. (Fun Fact: 0 is an integer, but is not positive nor negative)

Financial Purposes

Negative numbers play a huge role in this field, acting as numbers that represent loss, owing, withdrawal, stock market price that goes up or down while positive numbers represent profit, investments, deposit, etc. It also shows the difference between the value of a debit card and a credit card.

Temperature and Everyday Experiences

It is used to describe temperature that degrees 0-degree Celsius in different terms including weather forecasting, medical field, and many more. In addition, it is also used for measuring distances below the surface, for example: sea level, etc.

Studying about negative numbers and the ways of calculating it, is helpful for our daily basis.

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## Dividing and Multiplication by 0.1

This round, Math class is focused mainly on Decimals. While most of us is familiar with whole numbers, decimals are also important to keep in mind.

This is a video I made to show some of the conversion from Fractions to Decimals that are most important to keep in mind.

With whole numbers, multiplication means making the number bigger and division means making the number smaller. However, it is the exact opposite when it is applied to the number ‘0.1’. Let’s learn more about that in this video that I have created just for you.

## The Course of Ratio

Imagine you want to compare the numbers of women and men in the entire globe, but there are billions and billions of them. How can you easily compare those big numbers?

Well, Ratio is our solution in this case.  “Ratio” is the comparison of two numbers in relevant to each other in the simplest form. Back to our problem, the ratio of women and men can be 1:4(one to four)meaning the number of men is 4 times greater than the number of women. (Photo from newsx.com)

Ratio allows us to compare two related numbers easily and it helps us to understand the comparison faster in the simplest form.

What do I mean when I say the simplest form? For example, in math class, there are 20 girls and 30 boys. We can say the ratio of girls to boys is 2:3 because we divided 20 by 10 and 30 by ten and we get its simplest form. If we want to make the number as its simplest form, we need to divide both numbers with the same number just like the upper example.

Ratio is very useful when it comes to cooking. It allows us to cook in any size of the meal using the same formula. For example, the recipe is created for a 2 people meal but you want to cook that meal for a big party, you can look up its ratio and just multiply the number to make it suitable for your situation.

For example, we need 2 eggs and 3 kilograms of flour(The ratio of eggs to flour is 2:3)to cook for 2 people. If you are using that same recipe for 18 people, you can multiply 2 with 18 and 3 with 18 to follow the ratio.

## Lessons in Math Class Math is an essential part of our lives, no matter who you are. In Liger Leadership Academy, we take the math curriculum from Singapore to study. Mostly, we dive deeper into a certain topic each week or round. Problem-solving and teamwork is the two most important part of our Math class. I like the way we practice our maths in different ways including solving word problems and exercises in our workbooks, doing fun math games and activities, decoding riddles with math, etc. I have access to a wonderful math learning source online which is called Khan Academy which is introduced by our math teacher.

In these last several weeks, we have been reviewing about adding, subtracting and multiplication of fractions and mixed numbers. We did a lot of exercises both in the workbook and textbook to help us practice the lessons that we have learned. Algebra is also a new lesson that has been introduced several weeks ago. It is a new and efficient way to solve math problems that I have never learned about before. I am looking forward to learning new lessons in math class.