Question

Q1) Find the value of [(-15 + 9 - 10)] x [(5 x -10 x -1)]

Q2) Find the value of 'p' if p x (-9) = 135

Q3) Solve (800 x -25) + (800 x 75) using suitable property .

Q4) Use the sign < , > or = to make the statement true. 35 + (-70) - (-35) _______ (-24) - 15 + 39

<
>
=
Q5) The sum of two integers is -1500. If one of them is + 599, find the other integer.

Q6) The multiplicative identity of 20 is _______

1
1/20
-20
Q7) Which of the following statements is true?

a) The sum of two negative integers is always positive
b) The product of two negative integers is always positive.
C) Both a and b
Q8) On subtracting (-13) from (-8), we get ________
Q9) A thermometer records a temperature of -12 deg C for a certain chemical . After mixing it with an other chemical, the thermometer shows the temperature as 4 deg C. By how much will the temperature have risen ?

Q10) Find the value of 1 - 2 + 3 - 4 + 5 - 6 + 7 - 8 + 9 - 10.

Q11) The predecessor and successor of -200 are _______ and _______ respectively.

Q12) A submarine starts out at 135 feet below sea level. It dives 239 feet before rising 310 feet. Represent the current depth of the submarine as an integer.

Q13) In a winter day in Paris, the temperature was -4 deg C at 08:00 am. At dawn, the temperature was three times colder. What was the temperature? What was the difference in temperature?

Q14) If A + B = -10 and A - B = -2, find the value of A and B , if A and B are integers.

Answer 1

Answer:

1)36

2) -15

3) 40000

Step-by-step explanation:

[(-15) + 9 -10] x [5 x (-10) x (-1)]

[ (-15) + 9 + (-10)] x [5 x (-10) x (-1)

[(-15) + (-10)] + 9

(-25) + 9

5 x (-10) x (-1)

50 + (-14)

36

2) p x (-9) = 135

 p= 135/-9

p= -15

3)distributive property of multiplication over addition

a x (b+c)

800 x (75 + (-25) )

800 x 50

40000