1. Year 3-5 Mathematics Open-ended Activities
Number & Place Value

2. Place Value How many ways can you rename 1265?”
Open-ended Maths Activities by Peter Sullivan and Pat Lilburn

3. How many numbers can you make using the digits 1, 2, 3 and 4
How many numbers can you make using the digits 1, 2, 3 and 4? You can only use each digit once in each number.”
Place Value
Open-ended Maths Activities by Peter Sullivan and Pat Lilburn

4. A number has been rounded off to 1200. What might the number be?”
Place Value
Open-ended Maths Activities by Peter Sullivan and Pat Lilburn

5. Create a pattern that starts at 91 that someone else can continue.”
Number
Open-ended Maths Activities by Peter Sullivan and Pat Lilburn

6. The number 8 is halfway between two numbers
The number 8 is halfway between two numbers. What might those two numbers be?”
Number
Open-ended Maths Activities by Peter Sullivan and Pat Lilburn

7. I have some marbles. I give some away to my friends and I am left with 15. How many marbles might I have started with and how many might I have given away?”
Operations
Open-ended Maths Activities by Peter Sullivan and Pat Lilburn

8. Operations What might the missing numbers be?” ___ x ___ = 50
Teaching and Assessing Maths through Open-ended Activities by Pat Lilburn & Irene Sawczak

9. Describe how you would subtract 19 from 83 in your head
Describe how you would subtract 19 from 83 in your head. What other subtractions could you do using a similar method?”
Operations
Teaching and Assessing Maths through Open-ended Activities by Pat Lilburn & Irene Sawczak

10. I am thinking of a number between 8000 and 9000
I am thinking of a number between and Its hundreds digit is 5 and its ones digit is 2. What might the number be?”
Place Value
Teaching and Assessing Maths through Open-ended Activities by Pat Lilburn & Irene Sawczak

11. The number 17 cannot be divided equally by either 2 or 3
The number 17 cannot be divided equally by either 2 or 3. What other numbers are not divisible by either 2 or 3?”
Operations
Teaching and Assessing Maths through Open-ended Activities by Pat Lilburn & Irene Sawczak