Subtraction Blocks
Click on the first Web site, "Base Blocks Subtraction," below to play the subtraction game using the base blocks. Solve each problem by dragging each blue base block to a matching red base block to cancel it out. If needed, a base block can be carried over to the next column to regroup.
When you have completed 8 problems, click on the "Worksheet" link below. Using scrap paper, solve the first 10 subtraction problems, regrouping when necessary and type in your answer. After solving all problems, click on "Check Answers." Make any necessary corrections to your scrap paper and see where you made errors.
Then, draw the problems and answers to the first five using base blocks. Give a representation of each number in the problem in base blocks.
| Lesson Name: Subtraction Blocks | |
| Objective: Students will complete a game about subtracting numbers using base blocks. They will then complete an online worksheet of 10 subtraction problems and check their answers. | |
| Grade: (3-5) | Lesson Login: sub_blocks-a |
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Additional disciplines: Computer Skills ELA |
Materials: Computer with Internet access Paper and pencil |
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For AIS instruction, this lesson has been modified as follows: In the directions, the student has been asked to solve 8 problems on the Web site instead of 10. The number of problems to solve on the worksheet has also been reduced to 10. Click here for the original version of this lesson. | |
