NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 7: Comparing Quantities - Problems and SolutionsQuestion 81
Class 7 - Mathematics - Unit 7: Comparing Quantities - Problems and Solutions
Question. 81
Imagine that a 10 × 10 grid has value 300 and that this value is divided evenly among the small squares. In other words, each small square is worth 3. Use a new grid for each part of this problem, and label each grid “Value : 300.”
(a) Shade 25% of the grid. What is 25% of 300? Compare the two answers.
(b) What is the value of 25 squares?
(c) Shade 17% of the grid. What is 17% of 300? Compare the two answers.
(d) What is the value of 1/10 of the grid?
Answer:
(a) 75
(b) 75
(c) 17; 51
(d) 30
Detailed Answer with Explanation:
(a) 25% of 300 = 75. 25 squares × 3 = 75.
(b) 25 squares × 3 = 75.
(c) 17% of 300 = 51. 17 squares × 3 = 51.
(d) 1/10 of 100 squares = 10 squares. Value = 10 × 3 = 30.