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Transcript 
Multiply a Teens
Number
By a Single digit (Unit)
What is a Teens
Number?
•
•
•
•
•
•
•
13
14
15
16
17
18
19
Teens numbers are:
13 14 15 16
17 18 and 19
What is the same about
Teens numbers?
•Yes! They all
have ONE 10
•and a unit
First partition your teens
number:
• 13 x 6
• will be
• 10 x 6
• and
•3 x 6
Multiply the 10
•10 x 6 = ?
•60
Now Multiply the Unit
•3 x 6 = ?
•18
Add both answers
together:
• 10 x 6 = 60
• 3 x 6 = 18
• 60 + 18 = ?
• 78!
13 x 6 =
78
Can you x 15 by 3?
• 15 x 3 = ?
• 10 x 3 = ?
• Yes it’s 30!
•5 x 3 = ?
• Yes it’s 15!
Add your 2 answers:
•30 + 15 = ?
•= 45
How about 16 x 4?
• 16 x 4 = ?
• 10 x 4 = ?
• 40
•6 x 4 = ?
• 24
Add your 2 answers:
•40 + 24 = ?
•= 64
How about 17 x 3 ?
•
•
•
•
•
•
10 x 3 =
30
7x3=
21
30 + 21 =
51
Well Done !
• Now you are ready to multiply
a teens number by a single
digit (unit)
• Try these
• and ……
• Good Luck!
Find the answers:
•
•
•
•
•
•
•
14
17
18
16
15
13
19
x3=
x2=
x5=
x7=
x4=
x6=
x8=
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