Math 1: Review for Unit 1 Test

Order of Operations

100

A way to remember order of operations.

What is GEMS?

What is PEMDAS?

200

The answer to

3 + 12 x 4 - 2³

What is 43?

300

3³ + 2(5+6) - 4¹

3³ + 2(5+6) - 4¹ = 45

400

Simplify

(3+5)² + (12 x 2) - 4

What is 84?

500

Add Brackets to make this true:

15 - 2 x 3 + 4 / 2 = 8

15 - 2 x (3 + 4) / 2 = 8

Directed Numbers

100

The answer to (-3) + (-5)

What is -8?

200

7 + (-20)

what is -13?

300

(+9) - (-6) + (-6)

9

400

(-1)¹⁵ x (-1)²⁴

-1

500

((-9) + (-3))²

144

Multiples/GCF/LCM

100

Name all Prime numbers between 4 and 18

5,7,11,13,17

200

Write 90 as a product of primes

2 x 3² x 5

300

What is the highest common factor of 36 and 45?

9

400

What is the LCM of 9, 15, and 30

90

500

A bell rings every 20 seconds and another bell rings every 25 seconds. A third bell rings every 30 seconds. If they all just rang, how many minutes will it be until they ring at the same time again?

5 minutes 

Fractions!

100

I need to have a common denominator to do the operations of ___________ and ____________.

addition and subtraction

200

1 3/4  -  3/5

1 3/15 or 1 1/5

300

21/40 x 2/3 

AND SIMPLIFIED

42/120 --> 7/20

400

(3/7)²

9/49

500

6/7 + 1/3 x 2/7

18/21 + 2/21 = 20/21

Significant Figures

100

Round to the nearest thousandth: 123.78514

123.785

200

Round to 4 significant figures: 145684

145700

300

Write the number 304.5153 rounded to 3 d.p.

304.515

400

Explain the concept of rounding

answers can vary 

500

How many significant figures does 1389000 have? would it change if I made it 1380009?

4 significant figures

yes it would become 7