Question

1.(a) Write a positive integer and a negative integer whose sum is a negative integer.
(b) Write a positive integer and a negative integer whose sum is a positive integer.
(C) Write a positive integer and a negative integer whose difference is a negative integer.
(d) Write a positive integer and a negative integer whose difference is a positive integer.
(e) Write two integers which are smaller than-5 but their difference is -5.
(f) Write two integers which are greater than - 10 but their sum is smaller than - 10.
(g) Write two integers which are greater than - 4 but their difference is smaller than - 4.
(h) Write two integers which are smaller than-6 but their difference is greater than -6.
(I)Write two negative integers whose difference is 7.
(j) Write two integers such that one is smaller than-11, and other is greater than-11 but their
difference is -11.
(k) Write two integers whose product is smaller than both the integers.
( l)Write two integers whose product is greater than both the integers.

2. You are at an elevation 380 m above sea level as you start a motor ride. During the ride , your...............................
elevation changes by the following metres:540 m, -268 m, 116 m, -152 m, 490 m, -844 m, 94 m.
What is your elevation relative to the sea level at the end of the ride?

3.Evaluate the following, using distributive property.
(i) -39 x 99 (ii) (-85) x 43 +43 (-15)
(ii) 53 x(-9)-(-109) 53 (iv) 68 (-17) + (-68) × 3

4.If * is an operation such that for integers a and b we have a "b=a x b+ (a x a +b x b)
then find (i) (-3) * (-5) and (ii) (-6)* 2

5.Height of a place A is 1800 m above sea level. Another place B is700 m below sea level. What is the.................................
difference between the levels of these two places?

6. A green grocer had a profit of rs47 on Monday, a loss of rs12 on Tuesday and loss of rs8 on Wednesday. Find his net profit or loss in 3 days.
​

Answer 1

1.(a)

=6+(-10)

=6-10

=-4

(b)=4+(-1)

=4-1

=+3

(c)=-10-(+4)

=-10-4

=-6

(d)=12-(-6)

=12+6

=18

(e)=2-13

=-11

(f)=-18+7

=-11

(g)=-16-(-8)

=-16+8

=-8

(h)=-8-10

=-18

(i)=-14-7

=+7

(j)=-9-(+2)

=-9-2

=-11

(k)=+9-2

=-4

Answer 2

Write a positive integer and a negative integer whose sum is a negative integer in slovr