CBSE Class 4 Mathematics Mapping your way Assignment

Q1. If 1 cm on the map shows 200 km on the ground use this scale to find out the unknown in the table:
Answer: Given scale: \(1\text{ cm} = 200\text{ km}\)
1. For Delhi to Jaipur, ground distance = \(250\text{ km}\). Map distance = \(\frac{250}{200} = 1.25\text{ cm}\)
2. For Raigarh to Champa, map distance = \(\frac{1}{2}\text{ cm} = 0.5\text{ cm}\). Ground distance = \(0.5 \times 200 = 100\text{ km}\)
3. For Goa to Chennai, ground distance = \(900\text{ km}\). Map distance = \(\frac{900}{200} = 4.5\text{ cm}\)
Completed table:
 

In simple words: Divide the ground distance by 200 to get the map distance, and multiply the map distance by 200 to get the ground distance.
Exam Tip: Always write units clearly in ratios and proportions.

Q2. Make Tally marks to represent the data given below: No.of books issued by the students of class V E from the Library: Mathematics-11 Science-7 Social Science-18 Drawing-2 English-9 Computer-22
Answer:
 

In simple words: Represent every count of five with four vertical lines and a fifth diagonal line across them.
Exam Tip: Group tally marks in bunches of five for easy counting.

Q3. Prepare a pie chart based on the data given in the table below .Give it a suitable title.
Answer:
Title: Modes of Transport Used by Children
Total number of children = \(10 + 25 + 15 + 35 + 10 + 5 = 100\)
Fraction and angle calculation for each transport mode:
1. Van: \(\frac{10}{100} \times 360^\circ = 36^\circ\)
2. Car: \(\frac{25}{100} \times 360^\circ = 90^\circ\)
3. Bicycle: \(\frac{15}{100} \times 360^\circ = 54^\circ\)
4. Bus: \(\frac{35}{100} \times 360^\circ = 126^\circ\)
5. Scooter: \(\frac{10}{100} \times 360^\circ = 36^\circ\)
6. Pedestrians: \(\frac{5}{100} \times 360^\circ = 18^\circ\)
In simple words: Convert each category into a fraction of 100, then multiply by 360 degrees to find its angle in the pie chart.

Exam Tip: The sum of all angles in a pie chart must always equal 360 degrees.

Q4. Number of students participating in different games are given below. Draw a Bar Graph for the following information:
Answer:
Data summary: Cricket = 15, Table tennis = 18, Badminton = 30, Tennis = 5, Basketball = 35, Football = 50.
In simple words: Represent each game with a vertical bar whose height corresponds to the number of students participating.

Exam Tip: Choose an appropriate scale on the vertical axis so that all bars fit neatly within the graph area.

Q5. Draw the following picture in a \(\frac{1}{2}\text{ cm}\) grid and \(2\text{ cm}\) grid.
Answer:
To draw the given figures (kite, rocket, octagon, and house) in different grid sizes:
1. In a smaller grid (\(\frac{1}{2}\text{ cm}\)), the drawing will appear smaller and more detailed.
2. In a larger grid (\(2\text{ cm}\)), the drawing will be magnified proportionally, with each shape occupying more grid squares while maintaining the exact same geometric proportions.
In simple words: Redraw the shapes by keeping the same number of grid units relative to the new grid scale.

Exam Tip: Count the number of grid squares each line segment covers before redrawing in a different grid size.

Please click the link below to download CBSE Class 4 Mathematics-Mapping your way