Divisibility
2
Itself and 1
5 3/4, 5 1/8, 4 1/2, 3 7/8
What is the rule?
subtract 5/8
13 1/6 - 3 4/5
9 11/30
27
Use a factor tree to write as a product of prime factors
3 x 3 x 3
Ms. Jordan is making cookies. Each batch she makes uses a different amount of chocolate chips. the first batch uses 3 1/2 cups, the second batch uses 4 5/6 cups, the third batch uses 6 1/6 cups. By how much is she increasing the amount of chocolate chips (what is the rule)?
+ 1 2/6
A number is divisible by 3 if
The sum of all digits is divisible by 3
Rule: start at 3/8, add 3/16
Write the first 4 terms
3/8, 9/16, 3/4, 15/16
2 3/4 + 3 3/10
6 1/20
write as equivalent fractions
2/3 and 5/9
6/9 and 5/9
Ms. Jordan is making cookies. Each batch she makes uses a different amount of chocolate chips. the first batch uses 3 1/2 cups, the second batch uses 4 5/6 cups, the third batch uses 6 1/6 cups. How much will she uses in the fourth batch?
7 1/2 cups
A number is divisible by 5 if
it ends with 0 or 5
3/10, 2/5, 1/2, 3/5
What is the rule?
add 1/10
5 2/5 - 1 1/2
3 9/10
30
Use a factor tree to write as a product of prime factors
2 x 5 x 3
Bob is making a wooden table. He has 5 1/2 feet of wood. He uses 2 3/4 feet for the bottom, and 1 1/4 feet for the top. How much wood does he have left?
1 1/2 feet
The factors (up to 10) of 72 are
1, 2, 3, 4, 6, 8, 9
What is the next term?
13/18
12 3/4 - 6 1/6
6 7/12
write as equivalent fractions
7/12 and 5/18
21/36 and 10/36
Sally skateboarded for 4 miles this week. On Monday she skated 7/10 miles. Wednesday she skated 3/5 miles. How much did she skate on Friday?
2 7/10 miles
The factors of 210 (up to 10) are
1, 2, 3, 5, 6, 7, 10
2 1/3, 4 7/12, 6 5/6,
what is the next term?
9 1/12
11 1/9 - 3 2/3
7 4/9
150
5 x 5 x 2 x 3
Ms. Jordan has 4 3/4 cups of juice. She gives 1 1/10 cups to Bob, and 2 cups to Sally. How much does she have left.
1 13/20 cups