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