LCM and GCF
Find the LCM of 6 and 8.
What is 24
√64
8
√130 is between which two whole numbers?
11 and 12
Write 90,000 in scientific notation.
9 × 10⁴
Define a rational number.
A number that can be written as a fraction.
Find the GCF of 42 and 56.
What is 14
√225
15
√80 is between which two whole numbers?
8 and 9
Write 0.00075 in scientific notation.
7.5 × 10⁻⁴
Define an irrational number.
A number that cannot be written as a fraction; it doesn’t repeat or terminate.
What’s the LCM of 9 and 12?
What is 36
√196
14
Estimate √45 to the nearest tenth. NUMEBR LINE
6.7
Convert 3.4 × 10⁵ to standard form.
340,000
Is 0.25 rational or irrational?
Rational
A farmer has 90 cows and 126 sheep. What’s the largest number of equal groups he can make?
What is 18
True or False: √50 is a perfect square.
False
√200 is between which two perfect squares?
196 and 225
Which is larger: 6.8 × 10³ or 7.2 × 10²?
6.8 × 10³
Is √2 rational or irrational?
Irrational
Two buses leave the station at the same time.
The first bus stops every 12 minutes.
The second bus stops every 18 minutes.
After how many minutes will both buses stop at the same time again?
List multiples of 12 → 12, 24, 36, 48, 60...
List multiples of 18 → 18, 36, 54, 72...
LCM = 36 minutes
So, both buses will stop together again after 36 minutes.
What is the square root of 22 2
484
Estimate √500 to the nearest tenth.
22.4
The distance to the nearest star is 40,000,000,000,000 km. Write this in scientific notation.
4 × 10¹³
Explain why π (pi) is irrational.
Its decimal never repeats or ends, and it can’t be expressed as a fraction.