Unit 3, Lesson 12
Subtract Strategically
Grade 3
Activity 2
- Decide with your partner whether you will try to make the greatest difference or the least difference
- Take turns spinning and recording a digit in the hundreds, tens, or ones place. Continue until your numbers are complete.
- Find the difference.
- Compare your values.
- Write a comparison, using >, <, or =.
- Play again.
Student Section Summary
We learned algorithms to subtract numbers within 1,000. We also learned that we can choose whether to use an algorithm or another strategy for subtracting, based on the numbers.