Factor Trees
Create a Factor Tree for 12. What are the prime factors?
12 = 2x2x3
If there are 7 blue lollies and 8 green lollies. What is the ratio of green to blue lollies?
8:7
What is the index notation for 5x5x5
53
What is the scientific notation for 1,000?
1×103
Sarah has 3 apples and buys 2 more. How many apples she has now?
5 apples
Create a factor tree for 35. What are the prime factors?
36 = 2x2x3x3
If there are 6 apples and 3 oranges.
What is the ratio of apples to oranges in simplest form.
6:3 which then can be simplified to 2:1
What is the expanded form of 34?
3x3x3x3
What is 4.5 × 10² written in standard (ordinary) form?
450
A pack has 4 pencils. If you buy 5 packs, what is the total number of pencils?
20 pencils
Create a factor tree for 50. What are the prime factors?
50 = 2x5x5
If a recipe uses a ratio of 2 cups of flour to 1 cup of sugar.
How much sugar you need for 6 cups of flour.
3 cups.
26
What is the scientific notation for 0.006?
6 x 10-3
Tom has $20 and spends $7.50. How much money he has left?
$12.50
Create a factor tree for 104. What are the prime factors?
104 = 2x2x2x13
The ratio of boys to girls in a class is 3:4. If there are 12 boys, what is the total number of students in the class?
28 students.
What is the index notation for 5x5x54?
56
What is 6 × 10³ written in standard (ordinary) form?
6000
A car travels 60 km in 1 hour. How far will it travel in 2.5 hours at the same speed?
150km
Create a factor tree for 360. What are the prime factors?
360 = 2x2x2x3x3x5
The ratio of red to blue marbles is 5:3. If there are 40 marbles in total, what is the number of blue marbles?
15
What is the index notation for 2x2x2x3x3?
23x32
What is the scientific notation for 0.04?
4 x 10-2
A rectangle has a length of 8 cm and a width of 5 cm. What is its area?
40 cm2