Multi-Digit Multiplication Mastery
Grade 5 Mathematics Common Core State Standards Building Fluency with the Standard Algorithm
Learning Goals for Today
Fluently multiply multi-digit whole numbers (up to 3 digits × 2 digits) Master the standard algorithm for multiplication Explain reasoning using place value understanding Solve real-world word problems with multiplication
Warm-Up: Mental Math Challenge
Solve these quickly in your head: 7 × 13 = ? 6 × 24 = ? 9 × 15 = ? Share your strategies with a partner!
Place Value Review: Breaking Down Numbers
Example: 23 × 4 Break 23 into: 20 + 3 Multiply each part: (20 × 4) + (3 × 4) Calculate: 80 + 12 = 92 This connects to our standard algorithm!
Standard Algorithm Step-by-Step
Partner Practice Time
Work with your partner to solve: 46 × 13 57 × 21 Use the standard algorithm Check each other's work Raise your hand if you need help!
Real-World Word Problems
Problem 1: A factory packs 34 boxes each day. Each box contains 12 items. How many items are packed in one day? Problem 2: A school library has 42 shelves. Each shelf holds 16 books. How many books are in the library? Remember: Read carefully, identify what you're solving for, then multiply!
Reflection and Exit Ticket
Solve: 53 × 14 = ? Write one sentence explaining a step in the standard algorithm What was the most challenging part of today's lesson? How might you use multi-digit multiplication outside of school?