Question

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{v} 1-1) 200 umes
4. What will be the sign of the product, if we multiply go negative integers and 9 positive
integers?
5. What will be the sign of the product, if we multiply 103 negative integers and 65 positive
integers?
6. Simplify
(1) (-8)9+(-8) X 7
(ii) 9 (-13) +9x(-7)
(iii) 20 x(-16) +20x14
(iv) (-16)(-15)+(-16)X(-5)
(v) (-11) (-15)+(-11) (-25)
(VI) 10 (-12)+5X(-12)
(vii(-16)X(-8) +(-4) (-8)
(vii) (-26)x 72 +(-26)* 28
7. Fill in the blanks:
(1) (-6) (.....) = 6
(ii) (-18) (.....) = (-18)
(iii) (-8)(-9) = (-9)x(.....)
(iv) 7x(-3) = (-3)x(.....)
(v) {(-5)x3}x(-6) = (...... ) {3x (-6)} (vi) (-5) (.....) = 0
8. In a class test containing 10 questions, 5 marks are awarded for every correct answer and
(-2) marks are awarded for every incorrect answer and 0 for each question not attempted.
(1) Ravi gets 4 correct and 6 incorrect answers. What is his score?
(11) Reenu gets 5 correct and 5 incorrect answers. What is her score?
(lii) Heena gets 2 correct and 5 incorrect answers. What is her score?
9. Which of the following statements are true and which are false?
(1) The product of a positive and a negative integer is negative.
(11) The product of two negative integers is a negative integer.
lii) The product of three negative integers is a negative integer.
(iv) Every integer when multiplied with -1 gives its multiplicative inverse.
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Answer 1

Answer:

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