About Math

My topic :

Think about the times you have actually used mathematics you have learned in school in your daily life and decide which course had the most practical value. Provide examples. Now explain to your friend how a particular math course will be of practical assistance to him.

Math we learnt in school is used a lot in our daily life, even when we need buy something. Image we(my friend and me) are in a supermarket. We know numbers, then we know how to count and we can get the correct volume of apple. After we pick 5 apples, we know that each apple is worth 1 dollar. So, we need to pay 5 dollar. It's multiplication. ( 5 * 1 = 5) Turn left, we see bananas. Each branches of bananas value 1.5 dollar, we get 2 branches of it. We need to pay 3 dollar. (2 * 1.5 = 3) We used decimal and multiplication here. Then we use addition to add the price of apples and the price of bananas equal 8 dollar. (3 + 5 = 8) That is enough, we think. We can go to check out, but we want to separate our money and fruits. Thus, we take an apple out. Finally, I need to pay 3.5 dollar. It is subtraction and division.( 8 - 1 = 7, 7 / 2 = 3.5) From this example, we can get that addition, subtraction, division, multiplication are both a major part of math and a necessary, impartible part of our life.

Moreover, financial plans always play an important act in application of math. The following problem is about inequality we have learnt in Algebra two. Josh is trying to decide between two text messaging plans offered by a wireless telephone company. To compare these two rate plans, we can use inequalities. The monthly access fee for Plan 1 is less than the fee for Plan 2, $55 < $60. However, the additional text messaging fee for Plan 1 is greater than that of Plan 2, $0.25 > $0.20.

First of all, monthly fee of Plan 2 minus monthly fee of Plan 1 equal the price difference of two plans. (60 - 55 = 5) Because per additional text message values $0.25, let the price difference of two plans divide the price of per additional text message, we can get how many messages we send in Plan 1 that the prices of two plans will equal. (5 / 0.25 = 20) Twenty is not the final answer. After that, we should add the original text messages included in Plan 1 and twenty. Then we figure out the answer. If John texts less than 420, Plan 1 is better for him. On the other side, if John texts more than 420 a month, Plan 2 is better for him.

Otherwise, we can use what we learnt to do a lot of things, such as calculating our GPA and making a graph of monthly outcomes. They are all really interesting and useful things for us. We ought to study hard in math. There is a fascinating world not far away from us, while we understand math better.

Citation :

John A. Carter, Ph.D., Gilbert J. Cuevas, Ph.D., Roger Day, Ph.D., NBCT, Carol Malloy, Ph.D., Berchie Holliday, Ed.D. & Ruth Casey. “Algebra 2.” v2.0. McGraw-Hill