Half A Dozen

Without using a calculator evaluate:

3.5 + 2.1 = 5.6

7 x 2.5 = 17.5

5 - 2.3 = 2.7

9.8 + 2.31 = 12.11

4.54 - 2.7 = 1.84

145 รท 5 = 29

Aliens Calculating

A Mathematics Lesson Starter Of The Day

Topics: Starter | Arithmetic

  • 7C, Aylesbury High School
  • The question 9.87 - 8.5 has been mis typed in the answer section ... it shows 8.87 - 9.5 .

    Please correct!!!

    [Thanks 7C, the correction has been made - Transum]
  • Mr B, Devon
  • Is it possible to put the previous day and next day links at the top of the page, sometimes you have to scroll down a long way to find them because of all the comments. This would make navigating the site a lot quicker as not all of the starters are suitable for my classes. Thanks.

    [There are now previous day and next day buttons at the top of this panel. Hope that helps. Thanks for the suggestion. Transum]
  • Eliot - Year 6, Charnwood Primary School - Lichfield
  • Some challenging questions but they could be more difficult by having more decimal places.
  • Transum,
  • Not the most exciting Starter of the year but a very important one nevertheless. Regular arithmetic is vital to keep the skills sharp. If you hadn't realised it already every time this page is loaded a new of questions is presented so you can this page on more than one occasion.

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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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:


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.


Student Activity


Curriculum Reference

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


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