Fractions Packet - Examples And Worksheets With Answers Page 14
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42Divisibility RULES!
Dividing by 3
Add up the digits: if the sum is divisible by three, then the number
divides by three.
2
0
7
9
3
3
207
207
3
Ex.
therefore
divides by
603
603
3
6
0
3
9
3
3
Dividing by 4
Look at the last two digits. If they are divisible by four, then the number
divides by four.
24
24
4
6
124
124
4
Ex.
therefore
divides by
136
136
4
36
36
4
9
Dividing by 6
If the digits can be divided by two and three, then the number divides by
six
612
612
Ex.
2
306
1806
1806
2
903
612
6
And
therefore
divides by
1806
6
612
612
3
204
1806
1806
3
602
Dividing by 7
Take the last digit, double it, and then subtract it from the other
numbers. If the answer is divisible by seven, then the number divides by
seven.
28
-
14
14
2
287
7
287
Ex.
7
therefore
divides by
315
315
7
31
-
10
21
3
7
Dividing by 8
If the last three digits are divisible by eight then the number divides by
eight.
104
8
13
2104
8
2104
Ex.
therefore
divides by
3160
3160
8
160
8
20
Fractions Packet
Created by MLC @ 2009 page 14 of 42
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