Math Explorations 2 CH1-7

Adding and Subtracting Integers (CH 1-2)

100

-26 + 21

-5

200

35 - (-22)

57

300

The property representing -6 + 4 = 4 + -6. 

Communtative Property

400

Lisa’s bank account reads −$56. If Lisa withdraws $23 from her account, what will her balance be? 

- $79.00

500

The temperature in Anchorage, Alaska, is −15 ˚F. The temperature rises 12 ˚F during the day. What is the new temperature? 

-3 degrees F

Expressions and Equations (CH 3)

100

-7 = n + -2

n = -5

200

Write the expression: two greater than the quotient of 30 and 6

30/6 + 2

300

Write the expression: The product of 5 and x decreased by 2. 

5x-2

400

In 24 years, Victor will be 42 years old. How old is Victor now?

18 years old. 

500

63 + m= −18 

-81

Multiplication and Division (CH 4)

100

-6 x -4

24

200

17(−13) 

-221

300

46 ÷ (−2)

-23

400

3y – 5= 13

y=6

500

Write the expression AND solve for: 

the product of 3 times a number, increased by 6, is 12

3x + 6 = 12

x=2

Decimals (CH 6)

100

3.305 + 1.7

5.005

200

8.5 - 0.96

7.54

300

0.2 x 1.6

0.32

400

5.27 / 3.1 = 

1.7

500

3.18x – 1.5= 6.45

2.5

Number Theory (CH 7)

100

The greatest multiple of 7 that is less than 80. 

77

200

Is 153 prime or composite. Explain. 

Composite. 

The sum of the digits is 9, which is divisible by 3. 

300

What are the prime factors of 144. (Use exponents)

2⁴ x 3²

400

Write 0.0034  in scientific notation. 

3.4 x 10^-3

500

−14 ÷ 2 – 2 (12 − 15)²

-25