8th Grade RR Math

Equations

100

Solve for b.

12b = 24

b= 2

200

7-s=20

s= -13

300

-5 =-p/2

p=10

400

Solve for j.

5-2j=1

j=2

500

Solve for m.

13m+7m=20

m=1

Word Problems

100

Mary has 43 blue marbles, Benny has 49 blue marbles, and Sam has 31 blue marbles. How many blue marbles do they have in total ? 

123 marbles

200

Tim, Sam, Joan, and Benny each have 24 baseball cards.

How many baseball cards do they have in all ? 

72 baseball cards

300

Keith bought 9 dozen eggs from the grocery store to bake some cakes.

How many eggs did Keith buy ? 

108 eggs

400

Tom worked 30 hours in the last five days. Assuming that he worked the same amount of hours each day, how long did he work each day? 

6 hours

500

At an amusement park, Jason wants to ride a roller coaster that costs 21 tickers, and a bumper car that costs 18 tickets, and a merry-go-round that costs 29 tickets. Jason had 27 tickets, but lost 6 of them on a ride. How many more tickets does he need?

47 more tickets

Pythagorean Theorem

100

3 yd: 4 yd: c 

What is the length of the hypotenuse?

5 yards

200

b= 10, c= 6, a= ?

What is the length of the missing leg? 

a =______centimeters

a=8 centimeters

300

a: 8, b:15, c:? 

Find the hypotenuse, then what is the perimeter? 
_______centimeters

perimeter= 40 centimeters

400

A triangle has sides with lengths of 5 centimeters, 12 centimeters, and 13 centimeters. Is it a right triangle?

yes

500

In Booneville, the library is due south of the courthouse and due west of the community swimming pool. If the distance between the library and the courthouse is 15 miles and the distance between the courthouse and the city pool is 17 miles, how far is the library from the community pool? 

________ miles

17²-15²=c²

c=8

Scientific Notation

100

How do you write 764 in scientific notation?

_____× 10^___

  

7.64 x 10 ²

200

Which sign makes the statement true?

2.2x10⁴_____ 2.2x10²

< or > or =

>

300

Multiply. Write your answer in scientific notation. 

8 x (5x10³)

4 x 10 ⁴

400

Divide and write in scientific notation.

6x10⁴ / 1x10²

6x10²

500

Multiply. Write your answer in scientific notation.

6 x (2x10⁴)

1.2 x 10⁵

Random

100

What is the inverse operation (opposite) of -11?

11

200

Is -24/-4 positive or negative and why? 

positive, because the negative signs cancel out

300

Write 4 /8 in lowest terms:

1/2

400

What is 4 5/6 rounded to the nearest whole number?

29/6= 4.833=5

500

Evaluate the expression.

3+5÷1

8