Download Divisibility

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

page
1
page
2
page
3
page
4
page
5
page
6
page
7
page
8
page
9
page
10
page
11
page
12
page
13
page
14
page
15
page
16
page
17
page
18
page
19
page
20
page
21
page
22
Document related concepts
no text concepts found
Transcript 
Divisibility
Rules
What is Divisibility?
Divisibility
means that
after dividing,
there will be
NO
remainder.
356,821
• Can you tell by
just looking at
this number if it
is divisible by 2?
• by 5?
• by 10?
• by 3 ?
• by 9?
• By 6?
• The
divisibility
rules
can help
YOU !!!
Divisibility Rules
help you learn shortcuts to tell when a
number can be divided by another number
with NO remainder.
Divisibility by 2
• A number is
divisible by
2
if the
number
is even.
18 ÷ 2 = 9
22 ÷ 2 = 11
(Notice that both
of these numbers
are even.)
21 ÷ 2 = 10 R1
(Not an even number.)
Are these numbers divisible
by 2?
• 127
• 937
(Not an even number)
(Not an even number)
• 4678
Divisibility by 5
• A number is divisible by
5 if it ends in 0 or 5.
25 ÷ 5 = 5
23 ÷ 5 = 4 R3
Divisibility by
• A number
is
divisible
by 10 if
it ends in
0.
• 30 ÷ 10 = 3
• 340 ÷ 10 = 34
• 67 ÷ 10 = 6 R7
• 784 ÷ 10 =78 R4
Divisibility By:
2
1825
346
510
1108
5
10
Divisibility by 3
• A number is divisible by 3 if the sum of the
digits is divisible by 3.
Is the number 135 divisible by 3?
Add the digits: 1 + 3 + 5 = 9
Yes, 135 is divisible by 3 because the sum of the
digits is divisible by 3.
Divisibility by
• A number is •
divisible by 9
if the sum of •
its digits is •
divisible by
9.
369 is divisible by
9
because
3 + 6 + 9 =18
1 + 8 = 9
AND
9.
9 is divisible by
Review
Divisible by 3
204
15,192
Divisible by 9
Review
Divisible by 3
204
15,192
Divisible by 9
Review
Divisible by 3
204
15,192
Divisible by 9
Divisibility by 4
• A number is divisible
by 4 if the last two
digits are divisible
by 4. (Double 00)
• Is 124 divisible by
4?
• Is 7,235 divisible
by 4?
Divisibility by 6
• A number is
divisible by 6
if it is
divisible
by both
2 and 3.
• Is
by
• Is
by
342 divisible
6?
51 divisible
6?
Review
Divisible by 4
3,824
6,018
24,000
Divisible by 6
Review
Divisible by 4
3,824
6,018
24,000
Divisible by 6
Review
Divisible by 4
3,824
6,018
24,000
Divisible by 6
Review
Divisible by 4
3,824
6,018
24,000
Divisible by 6
After All, DIVISIBILITY Rules Are…
Un-frog-getable !!
The End !!
Related documents