Adding and subtracting integers

6(7 + x) + 5x

• 6x + 13

• x + 42

• 6x + 42

• 11x + 42

3-6-(-21)=

Tell whether this sentence is always true, sometimes true, or never true.  (COME UP WITH EXAMPLES BEFORE YOU PICK)

negative - positive = negative

• always true
• sometimes true
• never true

2(c - 8)

• 2c - 16

• 2c + 16

• 2c - 8

• c - 16

(+5) + (+3) = ?

• 8

• –8

• 2

• –2

-7x - 28

• -7(x + 4)

• -7(x - 4)

• 7(-x - 28)

• 7(x + 4)

Ms. Miles asked her students to write an expression whose answer was -20. The expressions written by four of her students is shown.

 

Which of the student(s) wrote a correct expression? 

• Abby and Gunner

• Abby, Laci, and Juan

• Abby, Gunner, and Juan

• All the students are correct

Which example is the associative property?

• 2+3=3+2

• 6(x+8)=6x+48

• (6+2)+8=6+(2+8)

• 6(0)=0

Lianne and Dania have 5 and 8 dolls, respectively. If the number of dolls are doubled, they will have 26 dolls in all. What property is being used in the given situation?

• Associative

• Commutative

• Distributive

• Identity