Math Review

Prime or Composite

100

List the first 5 prime numbers

2,3,5,7,13

200

How do you know if a number is Prime or Composite?

Numbers that are composite have more than two factors.

Numbers that are Prime only have the factors 1 and itself

300

Is the number 47 prime or composite?

Prime

400

What is the GCF of the prime numbers L and P

If L and P are both prime then the only common factor is 1.

500

Is the number 67 prime or composite

Prime

Decimals

100

What is the number one rule for ADDING or SUBTRACTING decimals?

When adding or subtracting decimals, the decimal has to line up.

200

In a multiplication problem, how do you know where to put your decimal in the answer.  Example:  276.23 x .5

Count the number of digits to the right of the decimal.  Start at the end of your answer and count that many spaces to the left.

300

What does Mrs. Hutson always say when working with decimals.  It is easier to think of decimals as what?

Money

400

Solve 782.35 x .8

625.88

500

Solve:  835.20 -72.4

762.80

Fractions

100

3/4 +2/9

35/36

200

2 3/4 - 1 7/8

7/8

300

Multiply 6/8 x 5/6 and simplify to lowest terms

5/8

400

What is the number one rule when adding or subtracting fractions?

Find a common denominator

500

What is the rule for dividing fractions?

Then solve 4/5 divided by 1/4

Keep Change Flip

3 1/5

Order of Operations

100

What is the order for solving an order of operations problem?

Parenthesis, Exponents, Multiplication/Division, Addition/Subtraction 

200

How do you know whether to multiply or divide first when solving a problem doing Order of Operations?

You work which ever comes first in the problem.

300

Solve

[{8x6+5-3}] - (15 x 2)

20

400

The problem was 20 - 5 x 2 + 3.  My answer was 33.  What did I do wrong. Fix my mistake.

I solved left to right instead of using PEMDAS.

Answer is 13

500

Why is it important to know PEMDAS

So everyone solves the problems the same way and gets the same answer.

Geometry

100

Formula for Area of a Triangle

Base x Height/2

200

Formula to find area of a rectangle

Length x Width

300

Formula for finding Volume

Length x Width x Height

400

I have a base of 9 in and my height is 4 in. My area is 1/2 of the total.  What is my shape?

Triangle

500

I am a rectangle and my area is 108 sq inches.  My length is 12.  What is my width?

9