Operations with Rational Numbers
What does a shaded box represent in adding/ subtracting integers?
-1
What is a ratio?
A ratio is a comparison of 2 numbers and are commonly written as fractions.
What is this fraction as a decimal? 3/7 (write to the first 2 decimal places)
0.42
Jane has $23 less than Jack. Write an expression for this context.
J- 23
you could've used any variable to represent the unknown number
What are the first 3 numbers in pi?
3.14
What is the opposite of -21?
positive 21
In the toolbox there are 4 nails and 30 screws. What is the simplified ratio of nails to screws?
2:15
What is this fraction as a decimal? 7/8
ROUND to the nearest hundredth place
0.88
8x+2x+2y-5y-10z
10x-3y-10z
if you are given the diameter, how do you calculate the radius?
What is -7 -2=
NO CALCULATOR you must use a numberline or chip tiles
-9
A tree grows an average of 15.5 feet in 10 years. What is the unit rate in feet per year?
1.55 feet per year
What is this fraction as a percent? 9/10
90%
9.8(p +5.2) +10.2p -11.5
20p + 39.46
What is the formula for finding the area of a circle and the circumference?
A= 3.14(r2)
C= 3.14(2)(r) OR 3.14(d)
81 degrees
Megan can read 125 words in 30 seconds, at this rate how long will it take Megan to read a 3,000 word essay?
12 minutes
What is 74% of 25?
18.5
Solve for x.
2(4x +8)= -32
-6
What is the circumference of a circle with a radius of 8in?
50.24in
- 1/2 + -3 2/3=
You must SIMPLIFY you answer AND turn improper fractions to mixed numbers
-4 1/6
Two numbers are in the ratio 9:5. If the smaller number is 20, what is the SUM of the 2 numbers
56
Mrs. Lighthill's salary is $86,000. If she gets a 4% raise, what is her new salary?
I will write the problem on the white board
-18 is greater than and equal to -x/2
x is greater than and equal to 36
What is the area of a circle with a diameter of 6in?
28.26in2