Work backwards.
Item 1 Item 2 Item 3 Item 4 Item 5 50
40 30 20 10 0
Draw a picture or model.
Problem-solving Keys
Modified by Susanna Kaitera (2015, 2021) from the following sources:
Herold-Blasius, R. (2021). Problemlösen mit Strategieschlüsseln. Eine explorative Studie zur Unterstützung von Problembearbeitungsprozessen bei Dritt- und Viertklässlern. Springer Spektrum.
Herold-Blasius, R., & Rott, B. (2016). Using Strategy Keys as tool to influence strategy behaviour. A qualitative study. Paper presented at the ProMath and GDM Working Group on Problem Solving, Halle. , 6 137-147.
Ministry of Education Singapore. (2012). Mathematics Syllabus 2013. Primary One to Six.