Lesson 2-1 Mental Math Adding
Standard: 4.NBT.4: Fluently add and subtract multi-digit whole numbers using the standard algorithm. Essential Question: How can you add with mental math? Lesson 2-3 Estimating Sums and Differences
Essential Question: How can you estimate sums? |
Lesson 2-2 Mental Math Subtracting
Essential Question: How can you subtract using a simpler problem? Lesson 2-4 Overestimates and underestimates
Essential Question: How can you tell if your estimate is too much or too little? |