O. Addition and Subtraction Practice
Complete these problems using pencil and paper or mental math. Use the Addition Strategies Menu and the Subtraction Strategies Menu from the Student Guide Reference section.
- Predict which of the following problems will have the smallest answer (sum or difference). Explain how you know.
- 750
− 262 - 689
+ 851 - 148
+ 198 - 9145
− 8997
- Explain how you can solve Question 5 using mental math.