multiplying 4 digits by 11 with carry over numbers

Home Community Questions & Answers Mental Math Q & A multiplying 4 digits by 11 with carry over numbers

Viewing 2 posts - 1 through 2 (of 2 total)
  • Author
    Posts
  • #10392
    Sima Patel
    Participant
    • Topics: 2
    • Replies: 0

    Hi! I just started this book today, finished the exercises in chapter 5. I got some of the questions wrong with 4 digits and carry over (I am always off on one of the two middle digits). Do you have examples for me? I only see 3 digit examples in the book.

    #10393
    Abhishek R
    Keymaster
    • Topics: 0
    • Replies: 45

    The steps are the same as 3 digit multiplication by 11.

    Here is an example of 4 digit multiplication.

    5763 x 11

    The first digit becomes the first digit of the answer

    5763 x 11 = 5 _ _ _ _

    Adding the next two digits 5 + 7 gives 12. The second digit 2 in 12 becomes the second digit of the answer.

    5763 x 11 = 5 2 _ _ _

    Since 12 has two digits, we carry over the first digit 1 so 5 becomes 6.

    5763 x 11 = 6 2 _ _ _

    Adding the next two digits 7 + 6 we get 13. The second 3 in 13 becomes the third digit of the answer

    5763 x 11 = 6 2 3 _ _

    Since 13 has two digits, we carry over the first digit 1 so 2 becomes 3.

    5763 x 11 = 6 3 3 _ _

    Adding the next two digits 6 + 3 we get 9 which becomes the next digit of the answer.

    5763 x 11 = 6 3 3 9 _

    The last digit 3 becomes the last digit of the answer.

    5763 x 11 = 6 3 3 9 3

    Let me know if this example clarifies.

Viewing 2 posts - 1 through 2 (of 2 total)
  • You must be logged in to reply to this topic.