Number system

Find out the numbers that has the greatest value a) 5.3 b) 4.99 c) 5.198 d) 5.04896 Children should have the ability to compare, order ad represent decimals (11, ACMNA105). The correct answer for the above question is 5.3. Some of the misconceptions could be:  some students may choose 4.99, with the misconception that 99 is the highest number, without considering the whole number, in which 4 is less than 5.  Students may rule out 4.99, compare the other three numbers, and choose 5…

Course and math Content Standards (Common Core or State) Provide the standards and performance indicators to be covered by this lesson, cite the numbers and the text. If only a portion of a standard is being addressed, then only list the part or parts that are relevant. This math lesson falls under the Tennessee Mathematical domain of the number system. Standard 3. Fluently add and subtract multi-digit decimals using the standard algorithm for each operation. Learning Objectives Provide the…

Specifically, how old is counting? When was representing quantities thought of? Where did it start? Counting originated based on the needs of societies. For example, a primitive society did not need more than a few numbers to manage their life, while a more advanced society needed more than a few numbers to…

Dunbar’s number. Dunbar’s number is, in fact, a series of numbers that represent the number of friends a typical person has that fit varying categories of familiarity and closeness. Maria Konnikova writes about Robin Dunbar’s research in her essay “The Limits of Friendship.” Robin Marantz Henig discusses the current plight of American millennials trying and failing to adjust to the world fast enough and become adults in “What is it About 20-Somethings?” Social media allows one to expand the…

Some ordered because they thought it would be fun to have their favorite numbers and letters on the number plates made specifically for them, when custom number plates were first introduced to the members of the general public. Of course, it is a fact that it's usually abundant and famous people with tailored plates hooked up on his or her high class cars. However, it soon turned out to become a very popular trend that not only famous individuals order custom plates from licensed plate makers.…

have to solve a problem to get the numbers out. The problem is 4(5+2x)-5=3(3x+7). First our mathematicians figured out 4 times 5 and 2x also 3 times 3x and 7 and reduced it to 20+8x-5=9x+21 then they subtracted 20-5 which reduced the problem to 8x+15=9x+21 then they subtracted 8x with 8x and 8x with 9x and written down its 15 =x+21 and then finally they -21 with 21 and 21 with 15 and got -6=x There is still no word on if the robbers are going to release the numbers but we will let you know as…

I have found that number talks are really helpful for building number sense as well as assessing number sense. When I use number talks in my classroom it allowed me to easily see gaps in understanding with some of my students. Simply learning math facts through memorization is not very helpful. I can't count the number of times that I have memorized facts of some sort for a test and then promptly forgotten all of the facts after finishing the test. Our brain just doesn't work that way. If we…

that showed the number and an equal number of shapes (card 5 would have 5 stars). She gave each student 2 cards and asked them to either add or subtract the two numbers. She then would ask the students who had the most or the least. This was fun to watch because they would get so excited when they could come up with the answer and “won” the question. In the other group, she had rocks with numbers on them. Students would pick a rock. They would then have to tell what number they had. She…

During my time in my Kindergarten LAL/Math resource classroom I observed a student, who will be referred to as Ally for confidentiality reasons. Specifically, I observed Ally’s number recognition ability. Ally is currently five years old and is in her seventh month of Kindergarten. Ally lives at home with her mother, father, and older brother Mathew. Ally’s parents are very involved in her school life. They attend celebrations, meetings, and other events. Ally comes from a Russian family. Her…

Grade level: a. 2nd Grade CCSS Content Standards for Mathematics Number and Operations (base ten or fractions) heading: a. NBT.5 Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction. Lesson objective(s): a. Students will be able to accurately use place value understanding and properties of operations to add and subtract numbers within 100. b. Through multiple activities students will…