Can u help in 3 digits bridge multiplication?

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  • #5098
    Preethi
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    • Topics: 1
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    I am still not able to understand the method

    #5100
    Ofpad
    Participant
    • Topics: 0
    • Replies: 158

    Hi Preethi,

    Let us try to multiply

    123 x 456

    The multiplications you have to do are the following:

    Step A) (1 x 4) = 4

    4 _ _ _ _

    Step B) (1 x 5) + (2 x 4) = 13

    5 3 _ _ _

    Step C) (1 x 6) + (2 x 5) + (3 x 4) = 28

    5 5 8 _ _

    Step D) (2 x 6) + (3 x 5) = 27

    5 6 0 7 _

    Step E) (3 x 6) = 18

    5 6 0 8 8

    Each step you visualize only the numbers to bridge. I have highlighted the numbers to visualize in each step below

    Step A) <u>1</u>23 x <u>4</u>56

    Step B) <u>12</u>3 x <u>45</u>6

    Step C) <u>123</u> x <u>456</u>

    Step D) 1<u>23</u> x 4<u>56</u>

    Step E) 12<u>3</u> x 45<u>6</u>

    So the numbers which are not highlighted you can drop in each step.

    I think the method is best illustrated in the video lesson. You can look at the Vitruvian man method as an alternative form of visualization.

    Let me know if this clarifies. If it doesn’t please let me know which step is confusing.

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