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This is a new powerpoint. If you find any errors please let me know at mccoach3@aol

This is a new powerpoint. If you find any errors please let me know at mccoach3@aol.com. NUMBER SENSE AT A FLIP. NUMBER SENSE AT A FLIP. Number Sense.

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This is a new powerpoint. If you find any errors please let me know at mccoach3@aol

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  1. This is a new powerpoint. If you find any errors please let me know at mccoach3@aol.com

  2. NUMBER SENSE AT A FLIP

  3. NUMBER SENSE AT A FLIP

  4. Number Sense Number Sense is memorization and practice. The secret to getting good at number sense is to learn how to recognize and then do the rules accurately . Then learn how to do them quickly. Every practice should be under a time limit.

  5. The First Step The first step in learning number sense should be to memorize the PERFECT SQUARES from 12 = 1 to 402 = 1600 and the PERFECT CUBES from 13 = 1 to 253 = 15625. These squares and cubes should be learned in both directions. ie. 172 = 289 and the 289 is 17.

  6. The Rainbow Method Work Backwards 2x2 Foil (LIOF)23 x 12 Used when you forget a rule about 2x2 multiplication • 45 x 31= • 31 x 62= • 64 x 73= • 62 x 87= • 96 x74=

  7. Consecutive Decades35 x 45 • 45 x 55= • 65 x 55= • 25 x 35= • 95 x 85= • 85 x754=

  8. Ending in 5…Ten’s Digits Both Even45 x 85 • 45 x 65= • 65 x 25= • 85 x 65= • 85 x 25= • 65 x65=

  9. Ending in 5…Ten’s Digits Both Odd35 x 75 • 35 x 75= • 55 x 15= • 15 x 95= • 95 x 55= • 35 x 95=

  10. Ending in 5…Ten’s Digits Odd&Even35 x 85 • 45 x 75= • 35 x 65= • 65 x 15= • 15 x 85= • 55 x 85=

  11. Squaring Numbers Ending In 5752 • 45 x 45= • 952= • 652= • 352= • 15 x 15=

  12. (1/8 rule) Multiplying By 12 ½ 32 x 12 ½ • 12 ½ x 48= • 12 ½ x 88 = • 888 x 12 ½ = • 12 ½ x 24 = • 12 ½ x 16=

  13. (1/6 rule) Multiplying By 16 2/3 42 x 16 2/3 • 16 2/3 x 42 = • 16 2/3 x 66 = • 78 x 16 2/3 = • 16 2/3 x 48= • 16 2/3 x 120=

  14. (1/3 rule) Multiplying By 33 1/3 24 x 33 1/3 • 33 1/3 x 45= • 33 1/3 x 66= • 33 1/3 x 123= • 33 1/3 x 48= • 243 x 33 1/3=

  15. (1/4 rule) Multiplying By 2532 x 25 • 24 x 44= • 444 x 25= • 25 x 88= • 25 x 36= • 25 x 12=

  16. (1/2 rule) Multiplying By 5032 x 50 • 50 x 44= • 50 x 126= • 50 x 424= • 50 x 78= • 50 x 14=

  17. (3/4 rule) Multiplying By 7532 x 75 • 75 x 44= • 75 x 120= • 75 x 24= • 48 x 75= • 84 x 75=

  18. (1/8 rule) Multiplying By 12532 x 125 • 125 x 48= • 125 x 88= • 125 x 408= • 125 x 24= • 125 x 160=

  19. Multiplying When Tens Digits Are Equal And The Unit Digits Add To 1032 x 38 • 34 x 36= • 73 x 77= • 28 x 22= • 47 x 43= • 83 x 87=

  20. Multiplying When Tens Digits Add To 10 And The Units Digits Are Equal67 x 47 • 45 x 65= • 38 x 78= • 51 x 51= • 93 x 13= • 24 x 84=

  21. Multiplying Two Numbers in the 90’s97 x 94 • 98 x 93= • 92 x 94= • 91 x 96= • 96 x 99= • 98 x 98=

  22. Multiplying Two Numbers Near 100109 x 106 • 106 x109= • 103 x 105= • 108 x 101= • 107 x 106= • 108 x 109=

  23. Multiplying Two Numbers With 1st Numbers = And A “0” In The Middle402 x 405 • 405 x 405= • 205 x 206= • 703 x 706= • 603 x 607= • 801 x 805=

  24. 10101 Rule Multiplying By 336718 x 3367 • 3367 x 33= • 3367 x123= • 3367 x 66= • 3367 x 93= • 3367 x 24=

  25. 121 Pattern Multiplying A 2-Digit # By 1192 x 11 (ALWAYS WORK FROM RIGHT TO LEFT) • 11 x 34= • 11 x 98= • 65 x 11= • 11 x 69= • 27 x 11=

  26. 1221 Pattern Multiplying A 3-Digit # By 11192 x 11 (ALWAYS WORK FROM RIGHT TO LEFT) • 11 x 231= • 11 x 687= • 265 x 112= • 879x 11= • 11 x 912=

  27. 12321 Pattern Multiplying A 3-Digit # By 111192 x 111 (ALWAYS WORK FROM RIGHT TO LEFT) • 111 x 213= • 111 x 548= • 111 x825= • 936 x 111= • 903 x 111=

  28. 1221 Pattern Multiplying A 2-Digit # By 11141 x 111 (ALWAYS WORK FROM RIGHT TO LEFT) • 45 x 111= • 111 x 57= • 111 x93= • 78 x 111= • 83 x 1111=

  29. Multiplying A 2-Digit # By 10193 x 101 • 45 x 101= • 62 x 101= • 101 x 72= • 101 x 69= • 101 x 94=

  30. Multiplying A 3-Digit # By 101934 x 101 • 101 x 658= • 963 x 101= • 101 x 584= • 381 x 101= • 101 x 369=

  31. Multiplying A 2-Digit # By 100187 x 1001 • 1001 x 66= • 91 x 1001= • 1001 x 53= • 1001 x 76= • 5.2 x 1001=

  32. Halving And Doubling52 x 13 • 14 x 56= • 16 x 64= • 8 x 32= • 17 x 68= • 19 x 76=

  33. One Number in the Hundreds And One Number In The 90’s95 x 108 • 105 x 96= • 98 x 104= • 109 x 97= • 98 x 105= • 97 x 107=

  34. Fraction Foil (Type 1)8 ½ x 6 ¼ • 9 1/2 x 8 1/3 • 5 1/5 x 10 2/5 • 10 1/7 x 14 1/2 • 3 1/4 x 8 1/3 • 6 1/4 x 8 1/2

  35. Fraction Foil (Type 2)7 ½ x 5 ½ • 9 1/2 x 7 1/2 • 4 1/5 x 11 1/5 • 10 1/6 x 14 1/6 • 2 1/3 x 10 1/3 • 6 1/7 x 8 1/7

  36. Fraction Foil (Type 3)7 ¼ x 7 ¾ • 8 1/2 x 8 1/2 • 10 1/5 x 10 4/5 • 9 1/7 x 9 6/7 • 5 3/4 x 5 1/4 • 2 1/4 x 2 3/4

  37. Adding Reciprocals7/8 + 8/7 • 5/6 + 6/5 • 11/13 + 13/11 • 7/2 + 2/7 • 7/10 + 10/7 • 11/15 +15/11

  38. Percent Missing the Of36 is 9% of __ • 40 is 3% of ______= • 27 is 9% of ______= • 800 is 25% of ____= • 70 is 4% of ______= • 10 is 2 1/2 % of _____=

  39. Base N to Base 10 Of426 =____10 • 546=_____10 • 347=_____7 • 769=_____9 • 1245=_____5 • 2346=_____6

  40. Multiplying in Bases4 x 536=___6 • 2 x 426= _____6 • 3 x 547=_____7 • 4 x 678=_____8 • 5 x 345=_____5 • 3 x 278=_____8

  41. N/40 to a % or Decimal21/40___decimal • 31/40= • 27/40= • 51/40= • 3/40= • 129/40=

  42. Remainder When Dividing By 9867/9=___remainder • 3251/9= • 264/9= • 6235/9= • 456/9= • 6935/9=

  43. 421 Method Base 8 to Base 27328 =____2 • 3548= _____2 • 3258=_____2 • 1568=_____2 • 3548=_____2 • 5748=_____2

  44. 421 Method Base 2 to Base 8 Of1110110102 =___8 • 1100012= _____8 • 1111002=_____8 • 1010012=_____8 • 110112=_____8 • 10001102=_____8

  45. Cubic Feet to Cubic Yards3ftx 6ftx 12ft=__yds3 • 6ft x 3ft x 2ft= • 9ft x 2ft x 11ft= • 2ft x 5ft x 7ft= • 27ft x 2ft x5ft= • 10ft x 12ft x 3ft=

  46. Ft/sec to mph44 ft/sec __mph • 88 ft/sec=_____mph • 120 mph=_____ft/sec • 90 mph =______ft/sec • 132 ft/sec = _____mph • 45 mph= ____ft/sec

  47. Subset Problems{F,R,O,N,T}=______ SUBSETS • {A,B,C}= • {D,G,H,J,U,N}= • {!!, $, ^^^, *}= • {AB, FC,GH,DE,BM}= • {M,A,T,H}=

  48. ___ Repeating Decimals to Fractions.18=___fraction • .25 • .123 • .74 • .031 • .8

  49. _ Repeating Decimals to Fractions.18=___fraction • .16 • .583 • .123 • .55 • .92

  50. Gallons Cubic Inches2 gallons=__in3 • 3 gallons =_____in3 • ½ gallon =______in3 • 77 in3=_______gallons • 33 in3=_______gallons • 1/5 gallon=______in

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