(i) Subtract (−40) from 70 
(ii) Subtract (-12) from (-20)

Chitra has Rs.150. She wanted to buy a bag which costs Rs. 225. How much money does she need to borrow from her friend?

The temperature at Srinagar was −3°C on Friday. If the temperature decreases by 1°C next day, then what is the temperature on that day?

Divide:
(i) (−85) by 5
(ii) (–250) by (–25)
(iii) 120 by (–6)
(iv) 182 by (–2)

A shopkeeper earns a profit of Rs. 5 by selling one notebook and incurs a loss of Rs. 2 per pen while selling of his old stock. In a particular day he earns neither profit nor loss. If he sold 20 notebooks, how many pens did he sell?

Calculate the area of the rhombus having diagonals equal to 6 m and 8 m.

The floor of an office building consists of 200 rhombus shaped tiles and each of its length of the diagonals are 40 cm and 25 cm. Find the total cost of polishing the floor at 45 per sq m.

Subtract:
i) 7pq from 11pq
ii) – a from a
iii) 5x + 7 from 21x + 9

i) Add: 3x − 4y + z and 2x − z + 3y
ii) Subtract 2x − 5y from 4x + 3y

Rani earns Rs.200 on the first day and spends some amount in the evening. She earns Rs.300 on the second day and spends double the amount as she spents on the first day. She earns Rs.400 on the third day and spends 4 times the amount as she spents on the first day. Can you give an algebraic expression of the total amount with her, at the end of the third day.

The cost of 1 box of tomato is Rs. 200. Vendan had money to buy 13 boxes. If the cost of the box is increased to Rs. 260 then how many boxes will he buy with the same amount?

(i) Name the angle that corresponds to \(\angle\)1.
(ii) Name the angle that is alternate interior to \(\angle\)3.
(iii) Name the angle that is alternate exterior to \(\angle\)8.
(iv) Name the angle that corresponds to \(\angle\)8.
(v) Name the angle that is alternate exterior to \(\angle\)7.
(vi) Name the angle that is alternate interior to \(\angle\)6.

(i) Which angles are corresponding angles to b°?
(ii) What is the measure of b°?
(iii) Which angles have the measure 68°?
(iv) Which angles have the measure 112°?

If l is parallel to m, find the measure of x and y in the figure.

Construct bisector of the ∠ABC with the measure 80°.