Counting disorganized amounts to 100
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Students learn to count disorganized amounts to 100. They do this by crossing off the counted objects.
Explain to students that it is important to be able to count amounts to 100 so you know how much of something there is. You also need this to work with number later.
The interactive whiteboard shows six numbers which are under one hundred. Ask students to name these numbers. You can do this in pairs, and then discuss as a class. You can also choose to ask about the order of the number. An example would be to ask which is the biggest or smallest number.
The interactive whiteboard shows an amount of cars. Use this image to demonstrate how to count the cars. Explain that it is useful to cross off the cars as you count them. That way you make sure you don't miss any or count it twice. You can demonstrate different ways of counting, from top to bottom, left to right. Demonstrate and then ask students to count out loud with you. Next there are stars. You can count them together and cross them off as you count. To check that students can count amounts, ask them to count the dots. Next students must decide if the child has enough flyers with them to give a flyer to each house on their route. They do this by counting the amount of houses and then comparing if that number is more or less than the number of flyers.
To check that students can count disorganized amounts to 100, you can ask the following questions:
- What number do you start at?
- How can you make sure that you don't count an object twice, or forget to count it?
- - How many objects are there?
Students count different amounts taken from exercises on their worksheet. The amounts keep getting bigger, and be sure to encourage students to cross off the objects as they count them to avoid missing objects or counting them twice.
Check that students can count disorganized amounts to 100. Emphasize that it is important to be able to count to 100, so you know how many objects you have. Check that they can count disorganized amounts to 100 by doing an exercise together as a class. Have students draw 15 to 20 dots on a sheet of paper or dry-erase board. Have the students sit in groups of 4 or 5 and then the groups must count how many dots they have as a group total.
If students have difficulty, encourage them to practice saying and writing the numbers to 100 on the number line.
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