The word problems in this resource deal with subtraction with minuends up to twenty. They are all “Change 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) “Change 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.
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Subtraction Word Problems to 20 Change Unknown
PDF (17 Mb / 15 pages)