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4 th Grade Math!

Explore the exciting world of 4th-grade math! Learn to compare numbers using alligator symbols and discover how fractions represent parts of a whole. Understand that different fractions can be equal and see how to identify even and odd numbers. Dive into multiplication and division with fun family analogies and develop your estimation skills with rounding. Unravel patterns and relationships while mastering measurements of length, area, and angles. Join us in making math fun and interactive!

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4 th Grade Math!

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  1. 4th Grade Math!

  2. 105 15 When comparing numbers, feed the alligator the big one! < = > = < < > = < > < = > 105 > 15

  3. Fractions show part of a whole! 1/8 of the pizza!

  4. Some fractions can be equal even if the numbers look different! 2/4 = 1/2 It’s the same thing!!! =

  5. The same number can wear many hats! 128 100+20+8 One hundred twenty-eight

  6. 2 4 6 8 10 12 14 16 18 1 3 5 7 9 11 13 15 17 Numbers are even or odd! Even! Odd! You can divide these by 2!

  7. MULTIPLES 2 x 6 = 12 2 rows and 6 columns

  8. Hooray! Hooray! Sets and Arrays! * * * * * * * * * * * * 4 x 3 = 12 3 x 4 = 12 12/3 = 4 12/4 = 3 = SET! ARRAY!

  9. 12 X 24 Don’t leave anyone out when multiplying! 4 8 2 4 0 + 2 8 8

  10. Multiply = gets bigger! 4 . . . 2 times! 4 x 2 = * * * * * * * *

  11. Divide = Break into smaller groups! * * * * * * * * * * * * 12 Divided into 3 groups * * * * * * * * * * * * = 4 per group 12 / 3 = 4!

  12. Remember your family when dividing! Dad – divide Mom – multiply Sister – subtract Brother – bring down Rover - remainder

  13. Estimate = educated guess! If I know this, then I can guess . . .

  14. Rounding: Find your place, Look next door, Five or greater, Add one more! 107 - round to the nearest ten Next door place 7 is greater than 5 . . . Add one more! 110

  15. Patterns: Can be numbers: 2,3,5,8,12,17 . . . 1,3,5,7,9,11,13 . . . Can be shapes:

  16. Number Sentences/Expressions: 4+3=7 88/11 = 8 7-2=5 21/7 = 3 50 x 2 = 100 5+3-1=7 94 – 22 = 72

  17. It’s the same thing! 4x3=12 3x4=12 5x3=15 3x5=15 You can switch the factors in multiplication and still get the same answer!

  18. Graphs

  19. Tables

  20. Parallel Lines • Perpendicular lines

  21. Cone Rectangular Prism Triangular Pyramid Rectangular Pyramid Cube Cylinder

  22. Reflection = flip

  23. Translation = slide

  24. Rotation = turn

  25. Directions: Right Left Forward Back Never eat soggy waffles!

  26. Two in one! Two shapes can be put together to make a different shape!

  27. Symmetry

  28. Flat on your face! A shape’s faces are flat! This shape has 6 faces, you even count the ones you can’t see!

  29. Perimeter – add the edges Perimeter = 28 inches

  30. Area – Multiply length and width 8 in. long 4 in. tall Area = 8 (length) x 4 (width) = 32 square inches

  31. Say What? in. = inches ft. = foot/feet yd. = yard m = meter cm = centimeter km = kilometer mm = millimeter

  32. Huh? lbs. = pounds oz. = ounces c = cup qt. = quart gal = gallon g = gram kg = kilogram

  33. Measurements • Door – feet • Football field – yards • Nail or pencil – inches • School to house – miles • glass of water – oz. • Milk jug – gallons • Eye dropper – milliliters • Soda bottle – liters • Quart - oil • Pint – ice cream • Paper clip – oz. • Baby – lbs. • Elephant – tons • Grams • Kilograms • Cup • kilometers

  34. What time is it? 60 min. or 1 hr. 5 55 10 15 50 45 20 40 35 25 30

  35. Line ‘em up! 1.42 .2 1.62 + When adding or subtracting decimals, be sure to line up your points!

  36. Equal Measurements: • 12 inches = 1 ft. etc

  37. Angles 0 degrees = 45 degrees = 90 =

  38. Kinds of angles Obtuse Right Acute

  39. Dude . . . Know your data lingo! Range = BIGGEST - smallest MOde = MOst often OUTlier = OUT on its own Median = Middle Mean = average + then /

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