Mathematics · Class 4
Smart Charts
Learn Smart Charts with notes, examples, and practice questions.
3 sections15–25 min read3 MCQs · 1 examples
Chapter Overview
Always read a chart's title, category labels, and key or scale before using its data.
Smart Charts teaches learners to collect, organise, and interpret data using tally tables, pictographs, and bar graphs. Questions focus on totals, differences, most and least values, and the meaning of a scale.
Organising Data
- Tally marks are grouped in fives for quick counting.
- A frequency table shows how often each category occurs.
- A pictograph key may give each symbol a value greater than one.
- Categories should not overlap when sorting responses.
Reading Bar Graphs
- Equal-width bars represent different categories.
- The vertical or horizontal scale gives each interval's value.
- Bar height or length shows the frequency.
- Subtract values to find how many more or fewer.
Solved Examples
Step-by-step solutions — read each step before checking the final answer.
Interpret a Bar Graph
A chart shows 18 mango votes, 12 apple votes, and 9 banana votes. How many more votes did mango receive than banana?
- 1Read mango's value: 18.
- 2Read banana's value: 9.
- 3Find the difference: 18 − 9 = 9.
Answer
9 more votes
Key Points to Remember
- ✓ Data is collected information
- ✓ Tallies group conveniently in fives
- ✓ A key gives a pictograph symbol's value
- ✓ A graph scale must be used when reading bars
Exam Tips
- • Do not assume one symbol equals one
- • Check the numbered scale intervals
- • Use subtraction for how-many-more questions
Practice MCQs — Smart Charts
Test your understanding with topic-wise multiple choice questions. Explanations appear after each answer.
Question 1 of 3Score: 0/0
A pictograph key says one star = 4 books. What do 5 stars represent?