To multiply by five, first
multiply by 10, then halve the
number.
Multiplying by
W
h
a
t
is
5
x
5?
Challenge:
What is 5 x 12 =?
5 x 30 =?
What is 5x8?
(10 x 8) ÷ 2 =
80 ÷ 2 = 40
First multiply by 10:
Then take half:
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5 x 10 = 50
50 ÷2 = 25
Poster by Mr. Ooley’s 4th Grade Class 2005—2006
