In this lesson, you learned how to write subtraction number sentences. In a subtraction number sentence, you find the missing part that joins with the given part to make the whole. Directions. 1. Click to begin. 2. Read the math story. 3. Draw an X on the bean plants that died. 4. Circle the healthy beans that are left. 5. Draw in the part-part-whole mat to show the story. 6. Write a subtraction number sentence to tell how you can find the missing part. 7. On page 2, grade your journal entry. 8. Tap the green check to add to your journal.