[size=150]We use numbers to tell us how many items or quantities there are of something.[br][br]What do you understand by the number 319?[br]What does the digit 3 represent in the number 319?[br]What does the digit 9 represent ?[br]Is the quantity represented by the digit 1 smaller than 9?[br]Is the position of each digit important ?[br]Is 319 the same as 139 or 913 ?[br][br]Explore the visual tool below. [br]1. Increase the value from 319 to 401, by one unit each time .[br]2. Note the number of dots as the number increases.[br]3. What is the maximum number of ones (red dots) you can display?[br]4. What is the maximum number of tens (blue dots) you can display?[br]5. Whenever we reach the maximum number for the digit in each position, how do[br] what do we do?[br][/size]

[size=150][url=https://www.geogebra.org/m/bqcjqCTM]https://www.geogebra.org/m/bqcjqCTM[/url] by [url=https://www.geogebra.org/u/rwright]Roy Wright[/url][/size]