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taconi12

fractions idea bank - 141 views

  • Fractions are as easy as pigs
  • One way to help students to understand the basics of adding and subtracting fractions (denominators must be the same; add/subtract the numerators; DO NOT add/subtract the denominators) is to teach the students what the parts of a fraction really are: numbers and names. This also helps combat the frequently-taught but incorrect idea that a fraction and a ratio are the same. A ratio may look like a fraction, but it is not a fraction.
  • FRACTIONS ARE AS EASY AS PIGS What is 2 pigs plus 3 pigs? 5 pigs (Write as a fraction: 2/pigs + 3/pigs = 5/pigs) Notice, we do not end up saying the answer is 5 horses.
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  • The top of a fraction is a NUMBER: 1, 2, 3, etc. The bottom of a fraction is a NAME: half, third, fourth, etc. We can add and subtract numbers. We cannot add and subtract names.
  • Fraction Blackjack
  • Ask each student their "denominator." Don't give it away. Ask each one until one finally says their name. Continue through the room... Their name is their denominator. When you practice adding and subtracting fractions with like denominators, actually say "pigs" instead the fraction name. Then say, "Instead of pigs, we are using ..." and let them answer with the appropriate denominator. It is fun when doing subtraction to say, "If we have 5 pigs and eat 3 pigs, besides a stomachache, what is left?"
  • The transition to unlike denominators is automatic. If the names are not the same, you can't add the fractions. 2/pigs + 3 horses is still 2/pigs and 3/horses (unless we discover a "common denominator" -- a common name: farm animals). Once the students know they must have a common name (denominator) in order to add or subtract, they have a reason to learn about common denominators. By the way, I always begin common denominators without worrying about the Least Common Denominator (LCD). Once they can find a common denominator (multiply the denominators), add or subtract, and then reduce, they can be led to finding "easier" denominators to work with. Students who have too much difficulty with LCD can still get the correct answer; they just have more reducing to do. Those who can find a lower common denominator have less reducing. This is a very basic rendering of "Fractions are as easy as pigs." AWP, 10/12/00 on teachers.net math board
  • Denominate means: to name Political parties nominate (name) their candidates. Religious denominations are identified by their names. The denominations of money are the names of the coins and bills.
  • One game that my students enjoy the challenge of is Blackjack 1. You need a set of fraction cards per student (or you can make them from index cards.) The same rules as Blackjack apply. Instead of trying to get to 21, they want to try and get close to 1 without going over. With this game they practice addition and comparing -- it's great. You can also make it more challenging or bring in mixed numbers with Blackjack 2 or Blackjack 3. (Blackjack 2 means to try to get as close to 2 as possible without going over.) I am not sure where to buy fraction cards. I have one set that I received when I took over a classroom. However, I have always had the students create their own sets and we used them for several games. I gave each students a set of index cards (3 1/2 X 5) and they wrote the fractions in pencil so they couldn't be seen through the cards. These are the fractions we included: all fractions with a denominator of 2, 3, 4, 5, 6, 8, 10, and 12. (To challenge the students you may want to use the 7, 9, and 11 denominators as well.) I also had the students include 2 0's such as 0/3 and 0/4 and two 1's such as 3/3 and 4/4. Each game required two sets of cards, so I had the students write their initials in the corner of their set so they would get a complete set back after the game.
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  • Fraction War Fraction War with the fraction cards: It is just like the card game of War, but with the fraction cards instead. This game helps students to compare fractions and encourages them to use number sense in comparison before using the algorithm of making equivalent fractions. Memory Memory with the fraction cards: It is just like the traditional "Memory" game, but any equivalent fractions are considered a match so 1/2 would be a match with 2/4. This game helps them to identify equivalent fractions. You can also play this game with fraction to decimal equivalence by making a set of decimal cards too. Fraction/Decimal Bingo Fraction/Decimal Bingo: The students have game boards with decimals on them. You call out fractions and if they have the decimal equivalence they can mark it on the board. Kimberly, 5/31 and 6/1 on teachers.net math board
Martin Burrett

BBC Maths - Converting fractions to decimals - 106 views

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    A great maths interactive videos and game about how to convert fractions to decimals. http://ictmagic.wikispaces.com/Maths
Martin Burrett

Equivalence - 94 views

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    Help your students understand equivalence between fractions, decimals and percentages with this visual number line flash resource. Peg the value to the correct position. http://ictmagic.wikispaces.com/Maths
Martin Burrett

Numberline Battleships - 146 views

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    Play battleships along a numberline using a variety of maths skills, including fractions, decimals and measurements. http://ictmagic.wikispaces.com/Maths
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    This game looks like fun but I can't get the site to load. Any suggestions? Thanks, Connie Warner
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    Just tried it again and it works fine. It is a flash resource, so make sure you have the latest player.
Martin Burrett

The Decifractator - 54 views

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    A good fractions resource where you input the numerator and denominator and you get the decimal equivalent. http://ictmagic.wikispaces.com/Maths
Martin Burrett

Freddy's Fractions - 16 views

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    "This is a fun flash game where players help a turtle to swim and collect the correct equivalent fractions."
Andrew Williamson

Numbers - Comparing fractions and decimals game - Game - 1 views

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    Great fractions site
Ed B.

Percent Worksheets | Converting Between Percents, Decimals, and Fractions Worksheets - 113 views

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    Website that generates great worksheets 
Martha Hickson

Ace Your Math Test | Enslow Publishers, Inc. - 59 views

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    Free worksheets available for all books in the series: addition/subtraction, multiplication/division, fractions/decimals, percents/ratios, pre-algebra/algebra, and geometry
taconi12

Math Forum: Ask Dr. Math FAQ: Integers, Rational Numbers, Irrational Numbers - 49 views

  • A rational number is any number that can be written as a ratio of two integers (hence the name!). In other words, a number is rational if we can write it as a fraction where the numerator and denominator are both integers. The term "rational" comes from the word "ratio," because the rational numbers are the ones that can be written in the ratio form p/q where p and q are integers. Irrational, then, just means all the numbers that aren't rational. Every integer is a rational number, since each integer n can be written in the form n/1. For example 5 = 5/1 and thus 5 is a rational number. However, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers. So the set of all rational numbers will contain the numbers 4/5, -8, 1.75 (which is 7/4), -97/3, and so on. Is .999 repeating a rational number? Well, a number is rational if it can be written as A/B (A over B): .3 = 3/10 and .55555..... = 5/9, so these are both rational numbers. Now look at .99999999..... which is equal to 9/9 = 1. We have just written down 1 and .9999999 in the form A/B where A and B are both 9, so 1 and .9999999 are both rational numbers. In fact all repeating decimals like .575757575757... , all integers like 46, and all finite decimals like .472 are rational.
emily hough

StudyJams - 10 views

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    various games for equivalent fractions, Mixed numbers and Decimals (also has related topics - percents, ratios etc.)
Martin Burrett

Free Math Worksheets - 78 views

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    A good maths website from the US with online questions, worksheets and factsheets on a range of numeracy topics. http://ictmagic.wikispaces.com/Maths
Martin Burrett

Maths Charts - 104 views

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    A great new resource from the creator of 'A Maths Dictionary for Kids'. Download and print beautifully designed and wonderfully useful maths posters on a good range of topics. Your classroom walls will never be the same again. http://ictmagic.wikispaces.com/Maths
Martin Burrett

Who wants to be a Mathonaire? - 178 views

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    This is a beautifully made 'Who wants to be a Millionaire?' maths game with 5 levels of difficulty to choose from. http://ictmagic.wikispaces.com/Maths
Martin Burrett

Maths Worksheets - 65 views

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    A simple looking site with a large collection of ready made maths worksheets with answers for many different areas of the maths curriculum. http://ictmagic.wikispaces.com/Maths
Martin Burrett

Maths Pop quiz (for 9-11 year olds) - 47 views

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    A 32 question long PowerPoint maths quiz I designed for a mixed ability class of 9-11 year olds. http://ictmagic.wikispaces.com/Maths
Martin Burrett

Mathopolis - Math Games - 175 views

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    A superb place to find games and questions for the whole of the maths curriculum. Join for free to track progress or just play the games. http://ictmagic.wikispaces.com/Maths
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