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Bryan’s Third Grade Math Presentation of the year 2008 - 2009 Fives 5x1=5 5 x 2 = 10 5 x 3 =15 5 x 4 = 20 5 x 5 =25 5 x 6 = 30 5 x 7 = 35 5 x 8 = 40 5 x 9 = 45 5 x 10 = 50 5 x 11 = 55 5 x 12 = 60 Squaring numbers 12 =1 22 =4 2 3 = 9 42 = 16 52 = 25 62 = 36 72 = 49 82 = 64 92 = 81 102 = 100 112 = 121 Rounding Rounding 5 4 6 7 3 2 1 0 8 9 10 Six’s 6x1=6 6 x 2 =12 6 x 3 = 18 6 x 4 = 24 6 x 5 = 30 6 x 6 = 36 6 x 7 = 42 6 x 8 = 48 6 x 9 = 54 6 x 10 = 60 6 x 11 = 66 6 x 12 = 72 Polygons and not polygons All of these are not a polygon. These are polygons My Math Shapes Small Red Square Medium Green Circle Large Blue Rectangle Medium Orange Pentagon Small Turquoise Hexagon Medium Dark Red Trapezoid Large Teal Triangle Small Pink Cylinder Medium Yellow Cube Pie chart 4 Strawberry, 4, 21% Lime, 3, 16% Grape, 4, 21% Lemon, 6, 31% Orange, 2, 11% The mode is 4. Pears in math Pears Pears 3 6 9 12 Costs $1 $2 $3 $4 Fraction from money Fraction from money • • • • • • Penny = 1 c = 1/100 Nickel = 5 c =1/20 = 5/100 Dime = 10 c =1/10 =10/100 Quarter = 25 c =¼ =25/100 Half dollar = 50 c =½ = 50/100 One dollar = $1.00 = 1 = 100/100 Congruent Congruent • Congruent means all sides are the same just like a square. The size does not need to be the same only the length matters. Combining like terms Combining Like Terms • Combining like terms is like this 3y + 5y = ?y the number is the term + the y (or other letter) so it is = to this 9y + 2y = 11y so the answer of 3y + 5y is = to 8y so 1y x 1y = ?y is it 1y yes it is correct. What is 1247 + 1113 =???? Here is the answer : 2360 Points and lines Point Line Line Segment Ray Vertex Parallel Line Intersecting Lines Perpendicular Lines Angles Angle Right Angle Acute Angle Obtuse Angle Straight Angle Triangles 1 right angle Scalene triangle Isosceles triangle Equilateral triangle 4 sided polygons Parallelogram Rhombus Rectangle Square Trapezoid Gas prices Bryan's Gas Prices of Two Companies $2.450 $2.400 $2.350 Arco $2.300 Mobil $2.250 5/ 11 /2 00 9 5/ 12 /2 00 9 5/ 13 /2 00 9 5/ 14 /2 00 9 5/ 15 /2 00 9 $2.200 The Polygon Shifter Once there was a point. He got tired of being a point so he turned in to a line. Then he got tired of being a line so he turned into line segment. A B Then he got tired of being a line segment so he turned into right angle . Then he got tired of being a right angle so he turned into triangle. Then he got tired of being a triangle so he turned into a square . Then he got tired of being square so he turned in to a pentagon. Then he got tired of being a pentagon so he turned into a hexagon Then he got tired of being a hexagon so he turned into a heptagon Then he got tired of being heptagon so he turned into a octagon. Then he got tired of being octagon so he turned in to a nonagon. Then he got tired of being nonagon so he turned into a decagon. Then he got tired of being decagon so he turned into a hendecagon. Then he got tired of being a hendecagon so he turned into a dodecagon Then he got tired of being a dodecagon so he turned in to a triskaidecagon. And that’s the end Factors Factors • Factors are numbers that is times to another number to make a whole number like this 3 times 4 equals 12 or 12 x 1 = 12. Got it? The meaning of E pluribus Unum E Pluribus Unum = out of many one Mixed numbers MIXED FRACTION is a fraction that has a whole What is this number? It’s 3 1/2 Patterns of 11 A pattern of 11 is 112 = 11 and 1112 = 121 the pattern is when 11112 = 12321 got it? 2 • • • • • • • • • 11 = 11 1112 = 121 11112 = 12321 111112 = 1234321 1111112 = 123454321 11111112 =12345654321 111111112 = 1234567654321 1111111112 = 123456787654321 11111111112 = 12345678987654321 Primes A prime is a number that can only be divisible by 1. Like this one. 53 Leap frog You are done Tessellations These are tessellations. These aren’t tessellations. Diameter Diameter Decimals 0.1 = 1/10 0.2 = 2/10 0.3 = 3/10 0.4 = 4/10 0.5 = 1/2 0.6 = 6/10 0.7 = 7/10 0.8 = 8/10 0.9 = 9/10 1 = 10/10 or 1 whole Pythagoras This is Pythagoras’s Pythagorean Theorem 4 tiles 3 tiles Bryan’s arrays 5,2 10,2 10,6 Puzzles Can you make the rider go on the cat Measurements 1 milliliter =1,000 liters Area This is the area of the auditorium’s carpet . 10.7 meters 13.6 meters Total = 145.52 square meters Area: the space inside a 2-D figure Example: this is 20 SQFT Percentage Percentage • Percentage is any number with a percent sign like this one %. You can also make it into fraction to like this one 50/100.What does the percent sign mean? It means 100. Möbius Glossary Bar graph • A square graph that has number on each end. Century • A century is 100 years. Congruent • All sides the same. Decade • A decade is 10 years. Denominator • A denominator is the bottom of a fraction. Diameter • A line that goes through any shape. Digit • A number that can’t pass 9. Graph • A picture and colors combined together. hexagon • A 6 sided polygon that has all sides closed. Mixed numbers • Mix numbers are a number like 1 and a fraction like ½ that = 1½. Numerator • The number that is on the top of a fraction. Octagon • A 8 sided polygon that all sides are closed Odd number • A number that is not even like 2 4 6 8 10 12 14 16 (etc.) Parallel lines • Lines that don’t intersect . Pentagon • A 5 sided polygon that has all sides closed. Perimeter • The length and with. Polygon • A polygon is a shape that Dozen • A dozen is the number 12. gross • Gross is the number 144. Bakers dozen • A bakers dozen is the number 13. Fort night • Fort night is 14 days or nights. Score • Score is 20 years or days. Millennium • Millennium is 1,000 years.