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The word problems in this resource deal with subtraction with minuends up to twenty. They are all “Start  Unknown” problems. They are presented on Think Boards, a device that suggests different strategies to use to solve the problem. The strategies used are: ‘Draw a Picture’, ‘Use a Number Line’, ‘Use a Ten Frame’, ‘Write a Number Sentence’ and ‘Part Part Whole’. Armed with the knowledge and experience of using a variety of strategies, the children will start to make their own decisions as to the most appropriate strategy for them to use at any one time.


You will find:

  • 5 posters showing the strategies used on the Think Boards for you to print and display in the classroom
  • 10 Think Boards – (2 per page) “Start Unknown” subtraction word problems – minuends to 20
  • 4 Think Boards - the number sentence (equation) is provided and students must create the number story
  • 2 Assessment Worksheets – each with 5 word problems.


Click HERE to save 20% by purchasing this resource in the Subtraction Word Problems to 20 Bundle.


Terms of Use:

This resource is for one classroom use only. It is bound by copyright laws and redistributing, editing, selling or posting this item (or any part thereof) on the internet are all strictly prohibited  without first gaining permission from the author. Violations are subject to the penalties of the digital Millennium Copyright Act. 


Subtraction Word Problems to 20 Start Unknown

  • PDF (15.5 Mb / 15 pages)

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