What's New

The app can now show both the decimal representation and the spelled out name of the number at the same time.
Further changes:
- Settings have been improved.
- iPhone X support.
- A small bug fix in Montessori mode

App Description

Experience grouping and ungrouping in our decimal number system with this interactive place value chart.

Touch the chart to create tokens and move them around with your finger. Is this always possible?

Remove tokens by moving them to the top of the chart. Shake your iPad or iPhone to remove all of them.

Some activities supported by this place value chart:
- How can you create large numbers using the least number of tokens?
- How can you remove tokens quickly without shaking the device?
- What happens if a token is moved from the hundreds to the ones? And what happens if you first move it to the tens place and then to the ones?

This brand new version features new options to show totals, both as a number and in written english. Furthermore it is possible to use it for decimal fractions.

The educational design of this interactive place value chart has been developed by Prof. Ulrich Kortenkamp (Didactics of Mathematics, University of Potsdam, Germany) and Prof. Silke Ladel (Didactics of Primary Education, Mathematics, Saarland University, Germany). It supports the development of mental concepts for place values in decimal systems and targets elementary and primary and lower secondary education.

iPhone Screenshots

(click to enlarge)

Place Value Chart screenshot 1 Place Value Chart screenshot 2 Place Value Chart screenshot 3 Place Value Chart screenshot 4 Place Value Chart screenshot 5

iPad Screenshots

(click to enlarge)

Place Value Chart screenshot 6 Place Value Chart screenshot 7 Place Value Chart screenshot 8 Place Value Chart screenshot 9 Place Value Chart screenshot 10

App Changes

  • June 09, 2014 Initial release
  • February 13, 2015 Price decrease: $0.99 -> FREE!
  • February 22, 2015 Price increase: FREE! -> $0.99
  • March 01, 2015 New version 4.0
  • June 03, 2015 Price decrease: $0.99 -> FREE!
  • June 08, 2015 Price increase: FREE! -> $0.99
  • December 07, 2015 Price decrease: $0.99 -> FREE!
  • January 02, 2016 Price increase: FREE! -> $0.99
  • January 13, 2016 New version 4.1
  • March 12, 2016 Price decrease: $0.99 -> FREE!
  • March 13, 2016 Price increase: FREE! -> $0.99
  • June 23, 2016 New version 4.2
  • November 18, 2016 Price decrease: $0.99 -> FREE!
  • November 19, 2016 Price increase: FREE! -> $0.99
  • June 13, 2019 New version 5.0
  • August 28, 2019 Price decrease: $0.99 -> FREE!
  • September 04, 2019 Price increase: FREE! -> $0.99
  • September 24, 2019 Price decrease: $0.99 -> FREE!
  • September 25, 2019 Price increase: FREE! -> $0.99
  • October 15, 2019 Price decrease: $0.99 -> FREE!
  • October 21, 2019 Price increase: FREE! -> $0.99
  • January 07, 2020 Price decrease: $0.99 -> FREE!
  • January 14, 2020 Price increase: FREE! -> $0.99