Find 0.52 – 0.08 using decimal grid models.

Add 3.2 + 6.4.

Add the following : (i) 30.9 + 52.73 (ii) 25.67 + 33.856

Subtract 2.85 from 4.97.

Subtract 3.09 from 12.7.

Naren bought 7.4 kg of mangoes. On the way home, he gave 4.650 kg of mangoes to his sister’s family. Find the weight of the remaining mangoes.

Sugarcane juice of 1.51 has to be shared equally among five members. What is the share of each member.

The perimeter of a regular polygon is 17.5 cm. Each side measures 2.5 cm. Find the number of sides of a polygon.

Convert the given decimals to percentage.
0.05

Convert the given decimals to percentage.
0.025

Convert the given percentage to decimals
(i) 58%
(ii) 8%
(iii) 30%
(iv) 120%
(v) 1.25%

How many per cent in the Fig. is shaded as blue?

Kumaravel has paid simple interest on a certain sum for 2 years at 10% per annum is Rs. 750. Find the sum.

Sathish kumar borrowed Rs. 52,000 from a money lender at a particular rate of simple interest. After 4 years, he paid Rs. 79,040 to settle his debt. At what rate of interest he borrowed the money?

A principal becomes Rs.10,050 at the rate of 10% in 5 years. Find the principal.

Solve: 5 − 7x ≥ 33, where x is an integer.

Represent the solutions −8 < 2x < 10 in a number line, where x is a natural number.

Solve the inequation: −2 ≤ z + 3 ≤ 5, where z is an integer. Also, represent the solution, graphically.

Draw concentric circles for the following measurements of radii / diameters. Find out the width of each circular ring.
 r = 3 cm and r = 5 cm.

Draw circles for the following measurements of radius (r)/ diameters(d).
 r = 3.5 cm

Draw circles for the following measurements of radius (r)/ diameters(d).
d = 6cm 

Draw concentric circles for the following measurement of radii / diameters. Find out the width of circular ring.
r = 5 cm and r = 7.5 cm.

Draw concentric circles for the following measurement of radii / diameters. Find out the width of circulating.
r = 7.1 cm and d = 12 cm

The marks obtained by 11 students of a class in a test are 23, 2, 15, 38, 21, 19, 23, 23, 26, 34, 23. Find the mode of the marks.

Find the mode of the following data. 14, 15, 12, 14, 16, 15, 17, 13, 16, 16, 15, 12, 16, 15, 13, 14, 15, 13, 15, 17, 15, 14, 18, 19, 12, 14, 15, 16, 15, 16, 13, 12.