Lesson 7

Multiplying More Than Two Factors

Est. Class Sessions: 1
X

Mathematical Standards

4.NBT.B
Use place value understanding and properties of operations to perform multi-digit arithmetic. (4.NBT.B.5)
4.OA.B
Gain familiarity with factors and multiples. (4.OA.B.4)

Standards for Mathematical Practice

MP2.
Reason abstractly and quantitatively.
MP8.
Look for and express regularity in repeated reasoning.

Students begin this lesson by finding products of three factors. They explore using the turn-around rule (commutative property) and grouping strategies (associative property) for multiplying more than two factors. They also use these strategies to find products involving numbers that are multiples of ten, such as 20 × 3. Finally, exponents are introduced as a shortcut for writing products involving repeated factors, such as 2 × 2 × 2 = 8.

Content in this Lesson

  • Finding products of more than two factors.
  • Using the associative property to find products of more than two factors using mental math.
  • Using turn-around facts to solve multiplication problems (applying the commutative property of multiplication) [E8].
  • Multiplying by numbers that are multiples of 10.
  • Solving multiplication problems using 0 and 1 as factors (applying the multiplication properties of 0 and 1).
  • Using exponents.
  • Determining multiples of a number [E2].
  • Finding factors of a number [E3].
  • Identifying prime numbers [E4].

Daily Practice and Problems U–V

U. Square Numbers

V. Grocery Shopping

X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide    
Student Activity Book      

Teacher Resources

 Teacher Guide - digital  

Supplies for Students

calculator
square-inch tiles

Materials for the Teacher

Unit 3 Assessment Record

Assessment in this Lesson

Assessment Expectation Assessed
Home Practice Part 4
Teacher Guide - digital
E2.
Determine whether one number is a multiple of another number.
E3.
Find the factors of a number.
E4.
Identify prime numbers.