Activity 1: Counting and multiples 1 to 1000

The purpose of these activities is to help students to recognise the whole numbers from 1 to 1000, to visualise and communicate patterns in numbers, and to develop a range of counting strategies with whole numbers.

Using the hundreds board (with offset), students could be asked to:

1. Complete the tasks in Level 1 activity 1 with the hundreds board using numbers from 1 to 1000.
2. Discover the Sieve of Eratosthenes
   1. Select all the multiples of 2 except for 2 and describe the pattern. Ask the students “What do we call these numbers?” (even numbers).
   2. Select all the multiples of 3 except for 3
   3. Select all the multiples of 4. Ask, “What do you notice and why do you already have these?”
   4. Select all the multiples of 5 except for 5 and describe the pattern.
   5. Select all the multiples of 6. Ask, “What do you notice and why do you already have these?”
   6. Select all the multiples of 7 except for 7
   7. Select all the multiples of 8. Ask, “What do you notice and why do you already have these?”
   8. Select all the multiples of 9. Ask, “What do you notice and why do you already have these?”
   9. Write out all the numbers remaining on the hundreds board. These are called prime numbers and write down the number of primes are there from 1 to 100. (Answer 25.)

Activity 1: Counting and multiples 1 to 1000 (PDF, 261 KB)

Activity 1: Counting and multiples 1 to 1000 (Word 2007, 20 KB)