Grade 4 · Computational Fluency
Multiplication and Division of Multi-Digit Numbers
Multi-digit multiplication in Grade 4 builds on the distributive property: 43x6 means (40+3)x6 = 40x6 + 3x6. This area model makes the calculation transparent and connects to the standard algorithm without sacrificing understanding. Students who understand WHY the algorithm works will never need to re-learn it. Division by a one-digit number uses both sharing (partitive) and grouping (quotitive) interpretations, and connects directly to multiplication through the inverse relationship.
LESSON VIDEO
▶
Lesson video
A short walkthrough to play in class or assign for flipped/at-home viewing.
WHAT STUDENTS WILL LEARN
✓Multiply two- and three-digit numbers by one-digit numbers using flexible strategies
✓Apply the distributive property: 43x6 = (40x6) + (3x6) = 240+18 = 258
✓Use repeated subtraction and equal sharing for division
✓Connect multiplication and division as inverse operations
✓Solve real-life and problem-based multiplication and division situations
✓Use number talks to develop and compare multi-digit multiplication strategies