(-10) + ( +7)=____

(a)

+3

(b)

-3

(c)

-17

(d)

+17

20 + (-9) + (9)

(a)

20

(b)

29

(c)

11

(d)

38

Which property is illustrated by the equation:(5 x 2) + (5 x 5) = 5 x (2 + 5)

(a)

commutative

(b)

closure

(c)

distributive

(d)

associative

Which of the following does not represent an Integer?

(a)

0 ÷ (-7)

(b)

20 ÷ (−4)

(c)

(-9) ÷ 3

(d)

(12) ÷ 5

(−16) ÷ 4 is the same as

(a)

- (-16 ÷ 4)

(b)

−(16) ÷ (-4)

(c)

16 ÷ (-4)

(d)

−4 ÷ 16

Fill in the blanks
(i) - 80\(\times \)__ = -80

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1

____\(\times \) 75 = 0

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0

 (−40) ÷____ = 40

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-1

20 + 80  +___ = 0

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-100

75 + (-25) = __

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50

(-675) - (-400) = -1075

(a) True

(b) False

(-15) x 5 = 75

(a) True

(b) False

(-100) x 0 x 20 = 0

(a) True

(b) False

(−64) ÷ (-64) is 0

(a) True

(b) False

The sum of two integers can never be zero

(a) True

(b) False

For any two integers 72 and 108, 72 +108 is an also an integer

(1)

Additive identity

For any three integers 68, 25 and 99
68 x( 25 + 99) = ( 68 x 25 ) + ( 68 x 9)

(2)

Multiplicative identity

0 + (−138) = (−138) = (−138)+0

(3)

Distributive property of multiplication over addition

For any two integers (−5) and 10
(−5) x 10 = 10 x (−5)

(4)

Commutative property under multiplication.

1 x (-1098) = (–1098) = (–1098) x 1

(5)

Closed under addition