Blots

The calculations are obscured by ink blots. What do you think the calculations would look like if there were no blots?

31 + 23 = 54

28 x 3.3 = 92.4

6.5 - 2.6 = 3.9

16.7 + 3.68 = 20.38

20.33 - 18.2 = 2.13

168 ÷ 7 = 24

Blot

Blot

Blot

Blot

Blot

Blot

Fountain Pen

Share

Topics: Starter | Arithmetic

  • Mrs Anne Davies, Congleton High School
  •  
  • My Year 8s really enjoyed this today! although they kind of found it difficult as they are in the bottom set!!
  • Mrs Edge, The Derby High
  •  
  • I find it interesting that as the final calculation is completely covered by a blot that a more obvious solution is not given in the answers at the bottom. Seeing a solution like 36 or 35 my classes are more likely to choose a solution from times tables not a divide.

    [Transum: The answers below are possible answers but, depending on where the blots fall, there are probably many other possibilities. Perhaps pupils could be encouraged to come up with the most interesting or unusual calculation for the some of the questions.]
  • Willamore Class, Buckfastleigh Primary School
  •  
  • My year 6 class found this quite straight forward and not too challenging for a Thursday morning!

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.
Click here to enter your comments.

If you don't have the time to provide feedback we'd really appreciate it if you could give this page a score! We are constantly improving and adding to these starters so it would be really helpful to know which ones are most useful. Simply click on a button below:

Excellent, I would like to see more like this
Good, achieved the results I required
Satisfactory
Didn't really capture the interest of the students
Not for me! I wouldn't use this type of activity.

This starter has scored a mean of 3.4 out of 5 based on 155 votes.


Previous Day | This starter is for 30 November | Next Day

 

Answers

There may be alternative answers depending on where the blots smudged to today

31 + 23 = 54

28 x 3.3 = 92.4

6.5 - 2.6 = 3.9

16.7 + 3.68 = 20.38

20.33 - 18.2 = 2.13

168 ÷ 7 = 24

Note to teacher: 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 above to regenerate another version of this starter from random numbers.



Casio Classwiz Calculator

There is currently a lot of talk about this new calculator being the best in its price range for use in the Maths classroom. The new ClassWiz features a high-resolution display making it easier to view numerical formulas and symbols but it isn't a graphical calculator as such (it has the capacity to draw graphs on your smart phone or tablet, via a scannable QR code and an app).

As well as basic spreadsheet mode and an equation solving feature you also get the ability to solve quadratic, cubic or quartic polynomial inequalities and the answer is given just as it should be written down, using the correct inequality symbols!

This calculator has a high-performance processor and twice the memory of previous models ensuring speedy operation and superior computational power.more...

Online Maths Shop

Laptops In Lessons

Teacher, do your students have access to computers?
Do they have iPads or Laptops in Lessons?

Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Laptops In Lessons

Here a concise URL for a version of this page without the comments.

Transum.org/go/?Start=November30

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

Transum.org/go/?to=Clouds

Student Activity


Apple

©1997-2017 WWW.TRANSUM.ORG