This week, in math class, we will begin to work with subtraction. We will use the concept to solve "take-away" questions and find the difference between two sets. Students will model these problems with manipulatives, draw pictures of them and write a math sentence or equation representing the problem. We will begin with the "take-away" problems. Examples of three problem types would be:
- Anna had 10 bears. She gave her brother three. How many does she have now? 10 - 3 = ____
- James had 15 marbles. He gave his brother some. Now he has seven. How many did he give his brother? 15 - _____ = 7
- Sue had some balloons and she gave her brother three of them. Now she has 7 left. How many did she have to start? _____ - 3 = 7
100 Day is coming up and we will be making 100 Day Posters in class. I have various collections of small objects, that the children will pick from to make their own poster. This is a great time to practice their skip counting skills as they organize their objects into sets of 10.