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Math Lesson: Multiplying Two- and Three-Digit Numbers

Subjects

Mathematics
--Arithmetic

Grade

3-5
6-8

Brief Description

Multiply the fun with this lesson that can be used to reinforce multiplication of 2- and 3-digit numbers.

Objectives

Students will

  • practice multiplying 2- and 3-digit numbers
  • play a card game to reinforce those skills.

Keywords

multiply, multiplication, two-digit numbers, three-digit numbers, card game, game

Materials Needed

  • deck(s) of playing cards with aces, 10s, and face cards removed
  • paper and pencils

Lesson Plan

Multiply the fun with this lesson that can be used to reinforce multiplication of 2- and 3-digit numbers. For example:

52 x 29 = 1,508

381 x 66 = 25,146

408 x 164 = 66,912


Begin the lesson by printing a sample multiplication format on a board or chart. For example, you might share this format for multiplying a 3-digit number times a 2-digit number.

____  ____  ____

X        ____  ____

-------------------------


Show students a deck of cards that has been shuffled after removing the aces, 10s, and face cards. (All that remain are cards numbered 1 to 9.)  Select the top five cards from the deck. Use the cards drawn to create a multiplication problem. For example, if the five cards drawn are the 4, 7, 2, 2 and 9, then use those cards to fill in the spaces in the format pictured above.

__4__  __7__  __2__

X         __2__   __9__

-------------------------


Invite a student(s) to come to the board to perform the multiplication operations.

__4__  __7__  __2__

X         __ 2__   __9__

   ---------------------------------

        4        2         4           8

        9        4         4           .

  ---------------------------------

1      3,        6        8           8


Provide some additional sample practice for students. Then you might divide the class into two teams or arrange students into pairs. If you arrange students into pairs, give each pair of students a deck of playing cards. Have them remove the aces, 10s, and face cards and shuffle the remaining cards. Then instruct them to draw four, five or six cards and solve problems on their own.

Depending on the skill you want to reinforce, students might solve 2-digit x 2-digit problems (draw four cards), 3-digit x 2-digit problems (draw five cards), or 3-digit x 3-digit problems (draw six cards) – or a mix of the three formats.

Students might take turns solving problems; while one student solves the problem by hand the other can use a calculator (or an online calculator) to check those calculations.                         

Assessment

Provide five similar sample problems for students to solve on their own. Students who get at least four of the problems correct will have mastered this skill.

Lesson Plan Source

EducationWorld.com

Submitted By

Gary Hopkins

National Standards

MATHEMATICS: Number and Operations
GRADES 3 – 5
NM-NUM.3-5.2
Understand Meanings of Operations and How They Relate to One Another NM-NUM.3-5.3 Compute Fluently and Make Reasonable Estimates
GRADES 6 - 8
NM-NUM.6-8.2 Understand Meanings of Operations and How They Relate to One Another NM-NUM.6-8.3 Compute Fluently and Make Reasonable Estimates

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