Eleventh of the Eleventh

Divide each of these numbers by eleven in your head.

99
99
242
99
209
165
154
44

Convert each of your answers to a letter and make a word (A=1, B=2 etc).

Also add up all of your answers and multiply the sum by eleven in your head.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

A Mathematics Lesson Starter Of The Day


Topics: Starter | Arithmetic | Mental Methods

  • Transum,
  •  
  • The eleven times table has always been very easy to learn up to 9 x 11. Here's a way of multiplying large numbers by 11 too:
    Example:
    Q. What is 324 x 11 ?
    A. Write down the first digit ... 3
    .......Add the first and second digits ... 3 + 2 = 5
    .......Add the second and third digits .. 2 + 4 = 6
    .......Write down the last digit ........... 4
    The answer is 3564.
    Try it yourself ... multiply 543 by 11
    Do you know why it works?
    Does it work for all three digit numbers?
  • Anna, Dorchester, St Birinus CE Primary
  •  
  • So what's the word?

    [Transum: Scroll down the page to see the answer]

How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
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Answers

DIVISION

1111

Notes for the teacher:

1. You can drag the numbers in the animation above and they will stop moving. Your pupils may prefer a stationary Starter rather than trying to keep track of the moving numbers.

2. It might be necessary to do the Eleven In Your Head activity first (the link is can also be found further down this page) before pupils are able to see the patterns and appreciate the place value significance.

3. Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click the button below to regenerate another version of this starter with a different word.



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Laptops In Lessons

Teacher, do your students have access to computers such as tablets, iPads or Laptops?  This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments:

Transum.org/go/?Start=November11

However it would be better to assign one of the student interactive activities below.

Laptops In Lessons

Here is the URL which will take them to a related student activity.

Transum.org/go/?to=eleven

Student Activity


Curriculum Reference

See the National Curriculum page for links to related online activities and resources.

Eleven
Apple

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