Introduction
Knowledge of numbers is the foundation of Mathematics. In Grade 4, students learn to read and write numbers up to five digits using International numerals.
Explanation Step by Step
The value of a digit depends on its position in a number. For a five-digit number, the places are:
Sub-topics
Reading and writing of International numerals
International numerals are the standard digits used globally (0, 1, 2, 3, 4, 5, 6, 7, 8, 9). To read large numbers easily, we use commas to group digits.
Examples
Example 1
Tricks and Shortcuts
Always remember the "3-2" rule for Indian numbering: place a comma after 3 digits from the right, then every 2 digits. For 5-digit numbers, it looks like: 00,000.
Common Mistakes
Forgetting to account for zeros. For example, 40,002 is "Forty thousand and two", not "Four thousand and two".
Practice Questions
Easy Questions
- Write the International numerals for the Devanagari number: ३,४५६.
- Write the number "12,500" in words.
- Identify the digit in the Hundreds place for the number 7,843.
Medium Questions
- Write "Thirty-five thousand sixty" in figures.
- Place commas correctly in the number 89234 and write its name.
- What is the place value of 9 in 92,341?
Hard Questions
- Form the smallest 5-digit number using the digits 5, 0, 2, 9, 1 without repetition.
- If a number has 7 in the Ten Thousands place and 3 in the Tens place, what is the number (use 0 for other places)?
- Convert the largest 5-digit Devanagari number into International numerals and write its name.
Revision Summary
Mastering place value and the use of commas is essential for reading and writing International numerals up to 5 digits accurately.