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# Multiplying Multiples

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Do you need extra help for EL students? Try the The Partial Products Strategy for Multiplication pre-lesson.
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Do you need extra help for EL students? Try the The Partial Products Strategy for Multiplication pre-lesson.

Students will be able to multiply whole numbers of up to four digits by one-digit and two-digit whole numbers, using strategies based on place value.

The adjustment to the whole group lesson is a modification to differentiate for children who are English learners.
(5 minutes)
• Begin this lesson by reviewing place value. Write a five-digit number on the board. Have students come to the board and identify each number's place value.
• Tell students that today they are going to use what they know about place values to help them calculate multi-digit numbers.
• Write a two-digit by one-digit multiplication problem on the board.
• Have students raise their hands and work on solving the problems to show you if they have previous experience with multiplying multi-digit numbers like the one on the board.
• Explain to them that it is very doable as long as they know the value of the two single numbers, place value, and a strategy called regrouping.
(15 minutes)
• Remind students of basic multiplication facts by using the Multiply! worksheet as a quick review.
• Offer students suggestions for this quick assignment by reviewing the patterns found in each row.
• Use the table to work on problems in which double digit numbers are multiplied by single digit numbers using problems from the Multiplication with Regrouping or Mammoth Multiplication Problems worksheets.
• Next use problems from the Double Digit Multiplication worksheet to use place value when multiplying multi-digit numbers by two-digit numbers.
(20 minutes)
• Have students find a partner.
• Pass out the Math-Go-Round (Hard) game and scratch paper for completing their calculations.
• Read the instructions for the game to students. Set a time limit for each calculation or for the entire game if you would like.
• Ask students if they have questions.
• Have students work in pairs to complete the calculations.
• Use the last 2â€“4 minutes to discuss any challenges.
(20 minutes)
• Pass out the Math-Go-Round (Expert) game and scratch paper for completing their calculations to students.
• Tell students that they will work alone to complete the game board.
• Make this a timed assignment if you would like.
• Remind students to use place value when calculating multi-digit numbers by two-digit numbers.
• If students get stuck, advise them to go to the next calculation.
• Allow time to review the challenging problems (as determined by the students) and answers after this assignment.

Support:

• Students who need extra support could create their own more simplistic problems and answer them.

Enrichment:

• Advanced students could create a children's book with step-by-step instructions for multiplying multi-digit numbers by one and two-digit numbers. They could also complete the Multiplying Multi-Digit Numbers worksheet which requires them to multiply several six-digit numbers by two-digit numbers and even multiply by three-digit numbers.
(10 minutes)
• Use the Multiplication Mischief worksheet to assess students' understanding of the lesson.
• Remind students that they must use place value to answer each question.
(5 minutes)
• Review place value and the multiplication chart.
• Write an equation on the board and have students work the problem out with you on the whiteboard.
• Ask students the following question and have them discuss with a partner, before sharing out with the whole group: "Why is it important to understand place value in multiplication?"

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