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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

Rope Tug - Decimals game - 1 views

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    Play a game of tug-of-war with decimals. Be the player with the highest decimal and find the different to win. http://ictmagic.wikispaces.com/Maths
Martin Burrett

Decimal Blackjack - 2 views

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    Online decimals maths game a lot like black jack
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    Play Blackjack with decimals. Play against the computer and be the closest to 2 but not over to win. http://ictmagic.wikispaces.com/Maths
Martin Burrett

BBC - Bitesize KS2 - Maths - Decimals - 32 views

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    An interactive video starring the BBC's Dick and Dom. Go on their adventure and solve decimal problems on the way. http://ictmagic.wikispaces.com/maths
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

Decimal Darts - 132 views

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    A maths darts game where players throw darts by estimating the decimal values between two numbers. http://ictmagic.wikispaces.com/maths
Martin Burrett

Decimal Speedway - 78 views

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    A maths virtual board game where players try to get the highest decimal values they can to move around the board. 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

Estimate - Number line game - 88 views

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    A great whiteboard game for teaching about number lines, decimals and place value. Work out what the number is along the number line. 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

Monster Bus - 103 views

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    A fun game which practises maths skills, including number bonds to 10 with decimals by driving the monster bus around the town to take little monsters to school. http://ictmagic.wikispaces.com/Maths
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
Ed B.

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

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    Website that generates great worksheets 
Martin Burrett

Scale Challenge - 98 views

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    This is a useful sport themed maths resource about measuring and estimating decimals, scales and place value. http://ictmagic.wikispaces.com/Maths
Martin Burrett

Decimal Places - 61 views

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    Play space invaders and save the world by using your knowledge of place value with this good flash game. http://ictmagic.wikispaces.com/Maths
mwellis

6.1 Learning about Multiplication Using Dynamic Sketches of an Area Model - 29 views

  • The figure below shows a rectangle with width 3 and height y. The product 3y represents the area of the 3-by-y rectangle. Change the value of y by dragging the red point up and down the vertical axis. Note that as the point is dragged, the area of the rectangle changes simultaneously.
    • mwellis
       
      This is a great exploration for students to begin making connections between whole number multiplication and decimal multiplication.  One modification I would make is to have students make a partition (on grid paper) to show the partial products so I could connect the figure to a symbolic algorithm for multiplication and the distributive property.  For example, if it was 1.2 x 3, the partial products might be (1x3) + (.2 x 3).
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    Example of using area model to explore multiplication by values greater than 1 and values between 0 and 1.
Martin Burrett

Decimal Place Value Cards - 103 views

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    A great virtual place value card resource for whiteboards. Enter the number you want and see deans apparatus for each. http://ictmagic.wikispaces.com/Maths
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
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