App Detail » Mr Thorne's Subtraction Galaxy

What's New

This app has been updated by Apple to use the latest Apple signing certificate.

Bug fixes and new artwork.

App Description

Subtraction Galaxy is the fourth maths app from Mr Thorne Productions, the team behind the Mr Thorne Does Phonics videos and apps which have had huge success on Youtube and the App Store around the world. This app is dedicated to all the strands of subtraction through key stage 1 and key stage 2, from ages 6 - 11.

Created by a UK school teacher, Mr Thorne's Subtraction Galaxy is educational and fun, suitable for the classroom and for the home. 39 mental maths tests based on subtraction and counting back, beginning with:

'ONE LESS' 'TEN LESS' 'NUMBER FACTS FROM 10 AND 100' 'SUBTRACTING MULTIPLES' 'FRACTIONS' 'TAKING AWAY DECIMALS' 'HALVING' 'NUMBER SEQUENCES'
'-9 AND -11' 'NEGATIVE NUMBERS' 'WORD PROBLEMS' and MUCH MORE!

Each world offers 3 difficulties of tests. Different difficulty settings mean you can be tested on easier numbers (BEGINNER), with more challenging numbers (FIRST CLASS) or be stretched further with WORLD CLASS mental maths subtractions such as '672-494'. A NEW feature of this app is the TIME ATTACK mode which allows players to complete the level in 60 seconds.

This app is suitable for children aged 5+ but also ideal for children revising for ages 7+ and 11+ examinations.

Score 10 out of 10 on each difficulty setting to win a world for your 'Discovery' collection.

Can you find all 13 worlds to unlock the final Subtraction Galaxy?

Also available from Mr Thorne:


Mr Thorne's Times Table Terra - https://itunes.apple.com/gb/app/mr-thornes-times-tables-terra/id689941213?mt=8

Mr Thorne's Divide and Conquer - https://itunes.apple.com/gb/app/mr-thornes-divide-and-conquer/id715768684?mt=8

Mr Thorne's Addition SpaceStation - https://itunes.apple.com/gb/app/mr-thornes-addition-spacestation/id730449520?mt=8

Or get all 4 maths apps on Mr Thorne’s Maths Universe - https://itunes.apple.com/gb/app/mr-thornes-maths-universe/id789660735?mt=8

App Changes

• December 16, 2013 Initial release
• December 29, 2013 Price increase: $0.99 -> $1.99
• January 09, 2014 Price decrease: $1.99 -> $0.99
• March 23, 2014 Price decrease: $0.99 -> FREE!
• April 03, 2014 Price increase: FREE! -> $1.99
• April 24, 2014 Price decrease: $1.99 -> $0.99
• April 27, 2014 Price increase: $0.99 -> $1.99
• May 05, 2014 Price decrease: $1.99 -> $0.99
• May 15, 2014 Price increase: $0.99 -> $1.99
• June 07, 2014 Price decrease: $1.99 -> FREE!
• June 10, 2014 Price increase: FREE! -> $0.99
• June 29, 2014 Price increase: $0.99 -> $1.99
• July 22, 2014 Price decrease: $1.99 -> $0.99
• July 23, 2014 Price increase: $0.99 -> $1.99
• September 27, 2014 Price decrease: $1.99 -> $0.99
• September 30, 2014 Price increase: $0.99 -> $1.99
• February 23, 2015 Price decrease: $1.99 -> FREE!
• February 24, 2015 Price increase: FREE! -> $1.99
• March 14, 2015 Price increase: $1.99 -> $2.99
• March 16, 2015 Price decrease: $2.99 -> $1.99
• June 14, 2019 New version 2.0
• June 14, 2019 Price decrease: $1.99 -> $0.99
• June 16, 2019 Price decrease: $1.99 -> $0.99