Multiplying by 10, 100 and 1000

Multiplying by 10, 100 and 1000

Lessons

In this lesson, we will learn:

  • The patterns in multiplying by 10, 100 and 1000 (and their multiples)

Notes:

  • A multiple of 10 is any number that has 10 as a factor (Shortcut: a multiple of 10 is any number that ends in zero)
  • To multiply a whole number and 10, 100, 1000 (or their multiples)
    • Multiply the nonzero digits
    • Count the number of zeroes in the factors
    • Write the same number of zeroes in the product

\qquad \quad Ex. 30 x 7 00 = 21000

\qquad \quad Ex. 800 x 4000 = 3,200,000
  • Introduction
    Introduction to Multiplying by 10, 100 and 1000
    a)
    Patterns in Multiplying by 10, 100 and 1000

    b)
    Multiplying by Multiples of 10


  • 1.
    Multiplying by 10, 100, 1000
    Multiply:
    a)
    62 x 10

    b)
    9 x 100

    c)
    78 x 1000


  • 2.
    Multiplying by 10
    Multiply:
    a)
    3 x 80

    b)
    40 x 50

    c)
    4 x 900

    d)
    500 x 600

    e)
    6000 x 9000


  • 3.
    Use the Pattern of Multiplying by 10, 100, 1000 to find the missing number
    Find the missing number
    a)
    20 x _____ = 600

    b)
    30 x ______ = 120, 000

    c)
    ______ x 400 = 8000

    d)
    600 x _____ = 30000

    e)
    ______ x 70 = 210,000