Number Sense
Aviv can solve 12 math problems in 15 minutes. How many problems can he solve in 30 minutes?
12:15= 24:30
Therefore he can solve 24 problems.
imagine a square thats 3 yds on all sides, what might the answer be?
3x3 = 9yd2
An algebraic expression has constant term 12, variable t, and numerical coefficient 8. What might the expression be?
8t + 12
You have a bag with 1 red marble and 1 blue marble. You close your eyes and pick one marble at random.
What is the probability that you pick the red marble?
1/2 0.5=50%
12, 18, 27, 9, 42
from least to greatest: median: range:
9,12,18,27,42
median:18 range:33
2/4 - 2/10 =
2/4 x 5 = 10/20 2/10 x 5 = 4/20
10/20 - 4/20 = 6/20 (reduced -> 3/10)
imagine a rectangle, its top and bottom is 6m and its sides are 2m. what is the answer?
16m
Evaluate each expression by replacing n with 2.
2n + 3 =
=2 x __ +3
= __
4 , 7
A spinner is divided into 6 equal sections, numbered 1 to 6.
The spinner was spun once.
A) what is the probability that the spinner lands on a 3?
B) what is the probability that the spinner lands on an even number?
C) what is the probability that the spinner does not land on a 6?
A) 1/6
B) 1/2
C) 5/6
calculate the mean
24, 16, 35, 52, 18
145 divided by 5 = 29
Kareem can swim 8 laps in 12 minutes. How long will it take him to swim 10 laps?
8:12 = 10:15 Therefore it will take him 15 minutes to finish 10 laps.
2:3= 10:15 (2:3 x 5)
solve each equation.
A) x + 2 = 7
B) x - 3 = 5
A) x=5
B) x=8
Jocelyn has 6 birds. Their mean age is 10. The mode of their ages are 8. what might their ages be?
8,8,8,10,19,7
27/28 - 4/7 - 2/14 =
27/28 - 16/28 - 4/28 = 7/28 = 1/4
Jan collects foreign stamps.
Her friend gives her 8 stamps.
Jan then has 21 stamps.
how many stamps did Jan have to start with?
Let x represent the number of stamps.
Jan had 13 stamps to start with.
find mean, median, and mode
12,14,13,15,14,16,14
mean: 4 median: 14 mode: 14
3/4 + 1 1/3 - 5/3
= 3/4+4/3 - 5/3 (5/3 x4)
=9/12 + 16/12 - 20/12
=5/12
imagine a semicircle, and its diameter is 8in, what is the answer?
A= pi r2 divided by 2
pi x 42 divided by
ans: 2 25.1 in2
5x−7=3x+9
x=8
162, 154, 166, 159, 170, 168, 158, 62, 172
mean: 163.4 median:162 mode: 162