S.2 Math Review

Adding Fractions

100

1/3 + 2/3

what is 3/3 = 1

200

4/8+5/8

What is 9/8 or 1 1/8

300

13/25 + 12/50

What is 38/50 or 19/25?

400

1/3 + 5/6

What is 7/6 or 1 1/6?

500

All fractions need this before adding them

What is a common denominator?

Subtracting Fractions

100

4/5-2/5

What is 2/5?

200

7/9-2/9?

What is 5/9?

300

 9/20-3/10

What is 3/20?

400

7/12 - 2/36

What is 28/36?

500

The numerator represents this in a fraction

What is a part?

Prime or Composite

100

18

Composite

200

7

Prime

300

81

Composite

400

211

Prime

500

This has more than one factor going into the number

What is a Composite Number?

Factors Lists

100

18

What is 1, 2, 3, 6, 9, 18

200

15

What is 1, 3, 5, 15?

300

23

What is 1, 23?

400

45

What is 1, 3, 5, 9, 15, 45?

500

Another way to write a factor list is in this form

What is a factor tree?

Long Division

100

36/3

What is 12?

200

124/2

What is 62?

300

225/15

What is 15?

400

244/12

What is 12?

500

The four steps of long division are these

What is Divide, Multiply, Subtract, Bring Down?