Leah's Math Review

Variables

100

What does a equal? a x 7=35

a=5

200

Solve for x x-171=196

x=362

300

Solve for t t/4=13

t=52

400

Solve for n 25 x n=75 x 3

n=225

500

Solve for y 200+y=125+446

y=371

Decimals

100

0.2 x 0.4=

.08

200

.05+7.1=

7.15

300

2.05/.2=

10.25

400

.36-.2=

.16

500

2.3 x .2+2.1 x 1.2=

2.98

Measures of Tendancy

100

Find the range of the data set 30,21,42,35

Range=21

200

Find the median of the data set 42,38,51,36,45

Median=42

300

Find the mode of the data set 52,60,85,26,62,71

Mode=none *If you answered 0, that answer is wrong.

400

Find the mean of the data set *round to the nearest whole number 72,65,22,54,68,75,81

Mean=62

500

Find the range and the median of the data set 22,54,68,35,57,78

Range=56 Median=56

Greatest Common Factor

100

Find the GCF 24,48

24

200

Find the GCF 20,60

20

300

Find the GCF 102,78

6

400

Find the GCF 98,60

2

500

Find the GCF 515,420

5

Least Common Multiple

100

Find the LCM of 12,3

12

200

Find the LCM of 14,12

84

300

Find the LCM 30,13

390

400

Find the LCM 18,40

360

500

Find the LCM 62,24

744