In the number 231 I have 2 hundreds, 3 tens, and 1 one.” As you are saying this, get two flats, three longs, and one cube. “I am going to model how I can use base-ten blocks to find the sum of these two numbers. Write the problem 231 + 146 = on the board.
It represents 10.” Hold up a cube and say, “This is a cube. It represents 100.” Hold up a long and say, “This is a long. “Today we are going to add and subtract two- and three-digit numbers using base-ten blocks.” Students move from using base-ten blocks to using pictures of base-ten blocks to add and subtract three-digit numbers. The lesson was designed to help students gain a better understanding of adding and subtracting three-digit numbers. The lesson may be tailored using the suggestions in the Extension section. Use the Adding and Subtracting Using Base-Ten Blocks Worksheet and the responses to questions throughout the lesson to determine student understanding of using base-ten blocks to add and subtract three-digit numbers. The questions asked before, during, and after the lesson will cause students to reflect on their understanding of using base-ten blocks to add and subtract three-digit numbers. Students will add and subtract three-digit numbers using base-ten blocks. Inform students that they will be using these materials to help them add and subtract three-digit numbers. Inform them that base-ten blocks can be helpful in adding and subtracting three-digit numbers.ĭisplay the base-ten blocks. Inform students that our system for writing numbers is called the base-ten system because it is based on grouping things by tens. Scaffolding, Active Engagement, Modeling, Explicit Instruction W:
0 kommentar(er)
