Problems Like 73 – 19
Teacher’s Notes

These exercises and activities are for students to use independently of the teacher to practice number properties.

Number Framework domain and stage:

Addition and subtraction, AA to AM

Curriculum reference:

Number, Levels ¾

Numeracy Project book reference:

These activities can be used to follow the teaching episode in Book 5 called Problems Like 73 – 19 = ?. They are suitable for those students who are able to apply number properties successfully.

Prior knowledge:

Students should know basic facts to 100.

During these activities, students will meet:

Exercises like

  1. 73 -19 = ? ? 73 – 20 + 1
  2. 56 – 29 = 56 - ? + 4
  3. The generalisation for the above examples.

Practice exercises with answers:

PDF (97KB) or Word (47KB)