Category: Math

Math round 4

            It has been an amazing round learning about percentages and angles. I love learning percentages since I was in grade 4 because in my perspective, it is easy to understand and a very handy way of writing fractions. Percentage can be compared more easily than fractions, and it is short and easy to remember because the number of percentages are mostly used from 1 to 100, so you don’t have to remember a lot of numbers. Percentages are also useful in the way that we use to look at the increasing and decreasing. For an example: if we want to look at how many people have died due to the traffic accident between 2016 and 2017, the only way that is easy for us to know is looking at the percentage. If it says “From 2016 and 2017, the number of people that died due to the traffic accident has increased by 10%”, so by looking at that percentage, we know that it does not decrease that much. Percentages are now over and heads up to Angles.

          Learning angles is a little hard for me because I am not really good at it, but I told myself that “you are going to be an Angles master one day”. I know that I am not good at it, so I try to work on both the exercises about angles in the book and on Khan Academy. Doing exercises more and more help me a lot with Angles, so now I am pretty good at it. In geometry, an Angle is a place where two lines intersect and the until of an angle is degree. There are many types of angles that we name in mathematics and I will define them below.

1. Right: is an angle that is exactly 90 degrees
2. Straight: is an angle that is exactly 180 degrees
3. Acute: is an angle that is less than 90 degrees
4. Obtuse: is an angle that is greater than 90 degrees and less than 180 degrees
5. Reflex: is an angle measuring greater than 180 degrees and less than 360 degrees
6. Vertically opposite: is an angle opposite each other when two lines cross and they are always equal.
7. Complementary: Two Angles are Complementary when they add up to 90 degrees
8. Supplementary: is an angle that make a straight line and measures add up to 180 degrees.
9. Angles around: is an angle that is always add up to 360 degree

 

Math-round 3

This round we’ve been focusing on decimal. I am so happy learning about this topic even though I am not that master at it. The decimal point is the most important part of a Decimal number. I’ve been learning how to multiply, substract, add, and divide the decimals by both whole number and the decimal itself. As long as you pay attention to your teachers while they are explaining, it won’t be hard to do. Sometimes there are lessons that you are good at and there are lessons that you are not good at, but if you just try hard a little bit, everything will be possible I promise. I first found it really hard to divide, substract, add, and multiply the decimals by decimals, but I found it easy after spending ten to twenty minutes every day learning about this lesson and I finally pretty good at it. Now, heads back to the lesson that I learned.

 

Multiplying decimal with whole number like 10, 100, 1000, 10000, 100000…………………

If you multiply any decimal number with 10, the strategy to solve this problem is to just move the point (.) one place to the right. The same thing with 100, the only difference is that, if there are two zeros in the 100 like that, you just have to move the (.) two places to the right. Note: you just have to count the zero and move the decimal point (.) as the number of the zeros.

This is the formula

* 10 move the (.) 1 place to the the right

* 100 move the (.) 2 places to the right

* 1000 move the (.) 3 places to the right

* 10000 move the (.) 4 places to the right

 

For Example:

12.13 * 10 = 121.3

12.13 * 100 = 1213

12.13 * 1000 = 12130

 

Dividing decimal with the whole number like 10, 100, 1000, 10000, 100000……………

Dividing decimal is not that different from multiplying decimal. The only thing is that is different is that, if you divide any number (without a decimal point) with 10, you just have to move the point (.) one place to the left. This is the formula that helps me every time I get stuck.

/ 10 move the (.) 1 place to the left

/ 100 move the (.) 2 places to the left

/ 1000 move the (.) 3 places to the left

/ 10000 move the (.) 4 places to the left

Now you would have a question about how to multiply decimal with a number that doesn’t have zero, but it has something like this:  12, 34, 45, 65, ……………

In words, it is pretty hard to explain, but I have the example below that will help you to understand it better. For Example:

14.6448 / 12 = 1.2204

146.448 / 12 = 12.204

1464.48 / 12 = 122.04

14644.8 / 12 = 1220.4

Adding and Subtracting decimal with decimal and the whole numberThe thing that you need to do while subtracting and adding decimal with whole number is like the example below

  999.6                   999.6      

–                            +

   673                      673

________          ________

   326.6                  1672.6

The only difference when subtracting decimal with decimal is that, you have to place the decimal point at the same place. For example:

999.6                         999.6

–                               +

673.2                         673.2

_______                 ________

326.4                       1672.8

Math may not teach me how to add love or subtract hate, but it gives me hope that every problem has a solution.

Math-round 1 

There are 15 students including me in the 2:00 pm – 3:00 pm Math class.

              I really love learning Math.

This term, I have learned a lot about the Whole Numbers, More Calculation With the Whole Number, Fractions and Multiply and Divide Fractions. These are the topic that I like to do the most. When I have free time, I always work on it and spend some time learning some new vocabulary in English that is related to Math.  I have made a poster about inspiring people to study hard by a quote called “Make the most of your learning”. The picture below is the art that me and my partner made. All of this art is all representing studying, quotes about life and the benefits of trying hard. The figure below is a poster that I did.