Solving one-step equations
Solving multi-step equations
Mystery 1
Mystery 2
Math History
100
-1 + n = 2
-1 + n = 2
n = 3
100
2(x + 1) = 10
2(x + 1) = 10
x + 1 = 5
x = 4
100
\frac(5)( 4) + \frac(2)( 3)
\frac(23)(12)
100
What is 40% of 150?
60
100
How many numbers are in Pi (π)?
Pi is an irrational number. meaning its decimal representation goes on forever without repeating.
Infinity!
200
V - 5 = -13
V - 5 = -13
V = -8
200
3(x + 4) = 22
3(x + 4) = 22
3x + 12 = 22
3x = 10
x = \frac(10)(3)
200
What does “n” equal?
1 : 2 = n : 4
n = 2
200
What is a proportional table?
A proportional table is a table where the values in one column are always multiplied by the same number to get the values in the other column
200
The Only Even Prime Number: The number _____ is the only even number that is also a prime number.
a.) 0
b.) 2
c.) 10
d.) 1000
b.) The number 2.
Definition of a prime number: a number greater 1 that has only two factors, 1 and itself.
Definition of an even number: a number divisible by 2.
300
-18a = -72
-18a = -72
a = 4
300
4(x - 8) = -24
4(x - 8) = -24
x - 8 = -6
x = 2
300
One jar of crushed ginger costs $2. How many jars can you buy for $4?
2
300
Solve:
\frac(3)5×\frac(4)7
\frac(12)(35)
300
True or False: A Jiffy is a real time measurement?
TRUE: A "jiffy" is equal to 1/100th of a second
400
20x = 280
x = 14
400
-5 (3x - 45) = 50
-5 (3x - 45) = 50
3x - 45 = -10
3x = 35
x = \frac(35)(3)
400
Is this table proportional? Why or why not?
Yes, this table is proportional. You have to multiply the number of cases they order by 12 to get the number of paper towels.
400
One cantaloupe costs $2. How many cantaloupes can you buy for $6?
3 cantaloupes
400
______ is the only number that is spelt with the same number of letters as the number itself.
Four (4)
500
\frac(x)(20) = -15
x = -300
500
2(x + 4) = 24 + x
2(x + 4) = 24 + x
2x + 8 = 24 + x
2x = 16 + x
x = 16
500
What Is the Radius and the Diameter of the following circle?
r=50cm
d=100cm
500
This table is proportional, what is the constant of proportionality?
The constant of proportionality is 1/3.
500
How many people do you think need to be in a room for there to be a 50% chance that at least two people share the same birthday?
🎉 The answer is just 23! 🎉
It’s called a paradox because it feels like the answer should be much higher. But here’s what’s happening:Instead of thinking about just one person matching someone else’s birthday, we look at all the possible pairs of people in the group who could match.In a group of 23 people, there are 253 different pairs of people. That’s 253 chances for a birthday match! So even though it seems unlikely, the odds add up really fast.