How to Easily Memorize the Multiplication Table I The Great Courses

Most of us, when faced with math problems like these, immediately reach for a calculator or a pen. But imagine if you could perform these and other seemingly difficult—but surprisingly easy—cal…
Video Rating: 4 / 5

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24 Responses

  1. Jay Ellis says:

    I don’t get that

  2. Earnest To says:

    We Chinese memorize the multiplication table by “9 time table song” (《九因歌》)
    since childhood. This “9 times table song” has been invented 2000 years
    ago. It is very useful and that’s why we Chinese can tell you the result of
    any multiplication less than 100 almost at once. My daugther learned “9
    time table song” at six.

    《九因歌》
    一一如一、一二如二、一三如三、一四如四、一五如五、
    一六如六、一七如七、一八如八、一九如九、一乘十得一十

    二一如二、二二如四、二三如六、二四如八、二五得一十、
    二六一十二、二七一十四、二八一十六、二九一十八、二乘十得二十

    三一如三、三二如六、三三該九、三四一十二、三五一十五、
    三六一十八、三七二十一、三八二十四、三九二十七、三乘十得三十

    四一如四、四二如八、四三一十二、四四一十六、四五中二十、
    四六二十四、四七二十八、四八三十二、四九三十六、四乘十得四十

    五一如五、五二得一十、五三一十五、五四中二十、五五二十五、
    五六中三十、五七三十五、五八中四十、五九四十五、五乘十得五十

    六一如六、六二一十二、六三一十八、六四二十四、六五中三十、
    六六三十六、六七四十二、六八四十八、六九五十四、六乘十得六十

    七一如七、七二一十四、七三二十一、七四二十八、七五三十五、
    七六四十二、七七四十九、七八五十六、七九六十三、七乘十得七十

    八一如八、八二一十六、八三二十四、八四三十二、八五中四十、
    八六四十八、八七五十六、八八六十四、八九七十二、八乘十得八十

    九一如九、九二一十八、九三二十七、九四三十六、九五四十五、
    九六五十四、九七六十三、九八七十二、九九八十一、九乘十得九十

  3. samar albastaki says:

    And also in 9x table if u didn’t realize that if u look all first number
    from 0 to 9 and of course 1 x 9 = is 9 so u don’t need to add 0 but then It
    will be like 1 2 3 4 5 6 7 8 9 and then u go to the end which is 9 x 10 u
    will see that u need to start from zero until 9 and then the full answer is
    done it kind of hard to explain it on that way but it’s a very easy and
    interesting way 

  4. PAZ ZZZ says:

    that was cool huh.. im so shocked!!! by the way thanks for the tips..

  5. CARSON51597 says:

    I made it to grade 9 without knowing my times table. XD

  6. Eli Whiterod says:

    Just by being at this video i swear i have no life….

  7. Eliane Hale says:
  8. Daanish Nair says:

    I don’t understand that at all this video is not good for me

  9. kitsurubami says:

    i google my multiplications.

  10. Maddie Edwards says:

    I’m mines 144 i think 

  11. Tori Elmquist says:

    there is also the finger counting trick to 9s. if you hold you hands out
    fingers spread and you start at the left and count by the multiplier ,
    bending that finger down, your hands make the number for the answer. So
    9X7, you start on the left and count all 5 fingers on the left hand, the
    thumb on the right hand and then hold down the index finger on the right
    hand. This leaves 6 fingers to the left of the bent finger and 3 fingers to
    the right- or 63.

  12. Accel ZERO says:

    Let A be 1-10. 1 and 2 easy, 3 : 3, 6, 9 12 … , 4 : on the ten-place
    number if EVEN number it will be 0, 4 or 8, if it’s a ODD number, will be 2
    or 6, so since even has 3 numbers and odd has 2, so from 0(single digit
    number)4×0 to 4×2(even), 4×3 to 4x 4(odd), 4×5(even) ,
    4×8(odd), 4×10(even)… , 5 : 5 x A = Ax10/2, 6 : twice speed of 3, 7: juz
    learn, 8 : juz learn, 9 : 9xA = 10xA – A, 10 : number x A = plus one
    0 behind number. Just learn the rules and it will be easy in your brain. I
    got scolded in primary 1 for not using hand to count. lol.

  13. Daanish Nair says:

    oh really you made it to grade 9 I didn’t know that

  14. Jackie Tang says:

    好白癡。只能說發明99乘法表的人真的應該得數學獎

  15. Agus Budiono says:

    ok

  16. Sneha Prasad says:

    Thank u

  17. Joshua Harper says:
  18. Shabit Hassan says:

    I’m just here to learn my 13-20 times table. 

  19. Josh Gaming says:

    ummmmmm UHHHH ASK BOB HE KNOWS EVERYTHING

  20. Daanish Nair says:

    oh really you made it to grade 9 I didn’t know that

  21. E.T. says:

    Learning is the most amazing/fun gift you can give someone. School however
    can make learning for some people impossible.

  22. TheFlamingSkittles01 says:

    Mind blown!

  23. Randy Untalan says:

    Boo
    

  24. vespass2 says:

    Thanks so. Much.♣

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