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Alshamsi, S. (2013, November 22). How is adding and subtracting important in our daily lives. Retrieved March 11, 2018, from https://prezi.com/z29knu7c1qio/how-is-adding-and-subtracting-important-in-our-daily-lives/

Book, Growing Book by. “Domino Addition.” Pinterest, 12 Mar. 2017, www.pinterest.com/pin/AR-oMZEsI2uykkzpJIXiW6OwNWiV1gNOJfWX9QguKgXVyg71MZRLHIg/.

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The symbols for the arithmetic operations of addition (plus; “+”) and subtraction (minus; “–”) are so common today we hardly ever think about the fact that they didn’t always exist. In fact, someone first had to invent these symbols (or at least other ones that later evolved into the current form), and some time surely had to pass before the symbols were universally adopted. When I started looking into the history of these signs, I discovered to my surprise that they did not have their origin in antiquity. Much of what we know is based on an impressively comprehensive and still unsurpassed research (in 1928–1929) entitled History of Mathematical Notations by the Swiss-American historian of mathematics, Florian Cajori (1859–1930).

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1.OA.A.1 Use addition and subtraction within 20 to solve word problems with unknowns in all positions (e.g, by using objects, drawings, and/or equations with a symbol for the unknown number to represent the problem).

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Use addition and subtraction within 20 to solve word problems with unknowns in all positions.

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The importance of knowing how to add and subtract

It is important to know how to add and subtract because we use math in our daily life, we use addition to count the money we have, the time, books, clothes, pencils, and many more things.

Subtracting is important when you get a job, for example in a store or a bank we need to know how to subtract money in order to give clients the right amount.

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In this example we are told that we have a total of 13 wasps, 7 of them flew away, how many wasps do we have left? The correct answer is 13-7=6. Here we are subtracting 7 from 13 which gives us 6.

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In this example we have to solve the addition problem, we have to find 6 red trees and 5 green trees. The correct answer is our last choice. When we add 6 red trees plus 5 green trees, we have a total of 11 trees all together.

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Here we have one addition problem and one subtraction problem using an equation.
The answer for the first one is 6. Explanation: When we have 2 donuts and we are given 4 more, now we have 6 donuts.
The answer for our second problem is 2, Lets say that we have 5 donuts and we give 3 away, how many donuts are left? we are left with 2 donuts.

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Marbles of two different colors
paper
pencil

For our first activity I will be giving you students 20 marbles each, and I will let you guys choose 3 of your own equations to subtract, to write down on your paper and solve. You will later demonstrate to me with the marbles how you did your subtraction and give me the answer.

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Materials
Dominos
Paper
Pencil

This will be our activity #2, I will hand you domino's and you guys will perform the addition, I will ask one by one to show me the domino you have in your hand and give me the answer for the addition, then write it down in your paper.

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I think that these activities will be fun for you guys because we are doing something totally different, we are doing hands on activities which is fun at the same time we learn.