If you put three beads onto a tens/ones abacus you could make the numbers 3, 30, 12 or 21. What numbers can be made with six beads?
Lee was writing all the counting numbers from 1 to 20. She stopped
for a rest after writing seventeen digits. What was the last number
Follow the clues to find the mystery number.
When you arrive in the classroom on Monday morning you discover all the numbers have fallen off the class number square and they are in a heap on the floor. All that is left on the wall is a blank grid!
There's five minutes to go before the lesson starts and you need the number square.
Can you find a quick way of putting the numbers back in their right places on the grid?
Where will you start?
To help you think about this there is a blank grid and number tiles here doc, pdf.
Before you start think - does your class number square start with $0$ or $1$? Or a different number?
Some of your friends may want to have a go too.
What different ideas are there about how to put the number tiles back as quickly as possible?
Click here to see how Jonah started.
Let us know what you think is a 'smart' way of putting the number square back together.
How quickly can you achieve this using your 'smart' strategy?
After a little while, discuss different approaches together such as:
See if the children can devise some good strategies between them and then encourage them to experiment with different ones to see which ones help them put the number tiles back as fast as possible. You may find that different children find different strategies useful. Encourage them to articulate how they know where to put a particular number tile. Encourage explanations that focus on
pattern, place value and multiples.