eleven times table

Home Community Questions & Answers Mental Math Q & A eleven times table

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  • #5005
    Diegoc
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    • Topics: 1
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    liked the video on the 11 times table but how does that work on a 2 digit multicant?

    #5007
    Ofpad
    Participant
    • Topics: 0
    • Replies: 158

    Hi Diego,

    Here is an example 98 x 11

    First digit becomes the first number of the answer.
    So 9 in becomes the first digit of the answer

    98 x 11 = 9 _ _

    Sum of the two digits becomes the next digit digit of the answer.
    So the sum of the two digits of 98 is 9+8 = 17.

    Since there are two digits in 17 we carry over the 1 in 17. So adding 1 from 17 to first calculated digit 9 we get 9+1 =10

    98 x 11 = 10 _ _

    The 7 of 17 becomes the next digit of the answer.

    98 x 11 = 107 _

    The last digit becomes the last number of the answer.
    So 8 which is the last digit becomes the last number of the answer.
    98 x 11 = 1078

    Let me know if this helped.

    #5009
    Diegoc
    Participant
    • Topics: 1
    • Replies: 1

    thank you for explaining

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