3-Digit Multiplication

Explicit Instruction/Teacher modeling

• Write a problem on the board, like 4 x 213.
• Draw and display four circles, and using base ten blocks, build a model illustrating four equal groups of 213.
• Remind students that multiplication can be understood as equal groups or repeated addition, no matter the size of the factors.
• Draw a model of the example you built, demonstrating how to draw hundreds, tens, and ones (see example in resources).
• Write a repeated addition sentence to accompany the model (i.e. 213 + 213 + 213 = 852).

Guided Practice

• Hand out the 3-Digit by 1-Digit Multiplication worksheet.
• With the class, draw a model for problem one. Students may need to use scratch paper to draw models.
• Have students work with a partner to draw a model for problem two.
• Instruct students to draw a model for problem three independently, then go over the problem together.
• Review the algorithm (multiply the single-digit factor by each place value of the larger factor). Model an example, like 7 x 649.
• Explain that models help us understand multiplication, but the algorithm can be a more efficient way of finding the product.
• Have students use the algorithm to solve problem four on the worksheet with a partner.

Independent working time

• Instruct students to solve the remaining problems on the worksheet using the algorithm.
• Circulate and offer support as needed.