Student Instructions
                    Read ALL the instructions.
Look at the example in page number one. Then go to all the other pages and solve the subtraction problems.
1. Use the 
 tool and drag the blocks from the red box to represent the number on top.
2. To subtract, use the 
 tool and cross out the blocks that represent the number at the bottom.
3. Count the remaining blocks and use the 
 or 
 tools to write the answer.
Click on 
 after you complete all your work.
Click on 
 to begin.