Writing Expressions
write the expression: "5 more than a number n"
What is n + 5?
If you flip a coin 50 times and it lands heads 30 times, what is the empirical probability?
What is 30/50 = 3/5 or 0.6?
Solve: -3 + 7
What is 4?
What's the probability of rolling a 2 on a standard die?
What is 1/6?
Convert 0.75 to a percent.
What is 75%?
Write an expression "Twice the sum of a number x and 7"
What is 2(x+7)?
You roll a die 60 times. It lands on 3 fifteen times. What's the empirical probability of rolling a 3?
What is 15/60 = 1/4 or .25?
Solve: -8 - 5
What is -13?
What's the probability of pulling a red card from a standard deck of 52 cards?
What is 26/52 or 1/2?
Convert 3/4 to a percent.
What is 75%?
Write an expression: "The difference between 20 and a number y."
What is 20 - y?
You pick a marble from a bag 40 times. 12 times its blue. Find the empirical probability of blue.
What is 12/40 = 3/10 or 0.3?
Solve: 10 - (-4)
What is 14?
You have 4 red marbles, 5 blue marbles, and 1 green marble. What's the probability of picking green?
What is 1/10 (1 green out of 10 marbles total)?
Convert 125% to a decimal.
What is 1.25?
Write an expression: "3 times a number decreased by 8."
What is 3n - 8 (or 3x - 8)?
In an experiment, a spinner lands on red 16 out of the 40 spins. What is the empirical probability? SIMPLIFY!
What is 16/40 = 2/5 or 0.4?
Solve: -6 + (-9)
What is -15?
A bag has 3 apples and 2 oranges. You pick one at random. Probability of picking an orange?
What is 2/5?
Write 7% as a fraction. Simplify.
What is 7/100?
Write an expression: "One half of the quantity of a number plus 12."
What is 1/2(x+12)?
Out of 80 spins, the spinner lands on green 20 times. Find the empirical probability as a decimal.
What is 20/80 = 1/4 or 0.25?
Solve: -15 - (-10)
What is -5?
A spinner has 5 equal sections: 2 red, 1 blue, 1 green, 1 yellow. Probability of not red?
What is 3/5 (not red: blue, green, yellow)?
Write 5/8 as a percent. Round to the nearest tenth.
What is 62.5%?