Data Handling
ICSE · Class 4 · Mathematics
Quick revision notes for Data Handling — ICSE Class 4 Mathematics. Key concepts, formulas, and definitions for last-minute revision.
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Key Topics to Revise
1. Pictographs
- A pictograph uses pictures or symbols to represent data.
- Each picture stands for a certain number of items.
- We must always check the key to know what each symbol means.
2. Tally Marks
- Tally marks are used to count and organize data quickly.
- Every fifth mark is a diagonal line across the previous four vertical lines.
- One group of tally marks (||||) means 5.
3. Bar Graphs
- Bar graphs show data using rectangular bars.
- Bars can be vertical (up and down) or horizontal (left to right).
- The length of the bar shows the value of the data.
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