How to Quickly Multiply Numbers by 10, 100 and 1000
FAQs on Master Multiplying Whole Tens, Hundreds and Thousands for Class 4
1. How do you multiply by 10, 100, and 1000?
The simplest rule for multiplying a whole number by 10, 100, or 1000 is to add the correct number of zeros to the end of the number. This is a key place value multiplication strategy.
- To multiply by 10, add one zero to the right of the number (e.g., 45 × 10 = 450).
- To multiply by 100, add two zeros to the right of the number (e.g., 45 × 100 = 4500).
- To multiply by 1000, add three zeros to the right of the number (e.g., 45 × 1000 = 45000).
2. What is the easiest way to multiply by tens?
The easiest way to multiply a number by whole tens (like 20, 30, or 40) is to multiply the non-zero digits first and then add the zero at the end. This is a great mental math trick for Class 4 maths students.
- Step 1: Ignore the zero and multiply the base numbers. For example, in the problem 8 × 30, you would first calculate 8 × 3 = 24.
- Step 2: Add the zero back to the end of your answer. The result, 24, becomes 240.
3. Why do zeros increase when multiplying by 10 or 100?
Zeros increase because multiplying by 10 or 100 shifts each digit of the number to a higher place value, making the number larger. This concept is fundamental to understanding the number system.
- When you multiply by 10, every digit moves one place to the left (e.g., a 'ones' digit becomes a 'tens' digit). A zero is added as a placeholder in the empty ones place.
- When you multiply by 100, every digit moves two places to the left.
- This place value strategy is why we can simply add zeros.
4. What is place value in multiplication?
In multiplication, place value helps us understand how a digit's value increases when we multiply, especially by multiples of ten. It is a core concept in Grade 4 multiplication.
- Multiplying by 10 makes a number 10 times bigger by shifting all its digits one place to the left.
- For example, in 7 × 100, the digit 7 moves from the ones place to the hundreds place, making its value 700.
- Understanding this place value in multiplication is more important than just memorising the rule of adding zeros.
5. How can I use this worksheet at home?
This worksheet is an excellent resource for reinforcing Class 4 maths skills at home for homework, revision, or extra practice. You can use this printable multiplication worksheet for several purposes:
- Homework Help: To practice concepts taught in the classroom.
- Exam Revision: To prepare for school tests on multiplying by tens, hundreds, and thousands.
- Holiday Learning: To keep skills sharp during breaks.
6. Does this math worksheet include an answer key?
Yes, this practice worksheet on multiplying by 10, 100, and 1000 comes with a complete answer key. The provided solutions allow students and parents to check answers easily, making it a great tool for self-assessment and revision.
7. Is this worksheet free and printable?
Yes, this Grade 4 multiplication worksheet is completely free to download and print. It is available in a user-friendly PDF format, making it easy to access for classroom use, homework, or extra practice at home.
8. How does multiplying by 10, 100, and 1000 help with mental math?
Mastering this skill is a foundational step for building strong mental math abilities and improving maths fluency. It makes it faster to solve more complex multiplication problems mentally.
- It establishes a clear multiplication pattern (adding zeros) that speeds up calculations.
- It helps in breaking down bigger problems. For instance, to solve 32 × 20 mentally, you can calculate (32 × 2) and then add the zero.
- This skill builds confidence in handling larger numbers, which is crucial for Grade 4 maths.
9. What real-world problems use this multiplication skill?
This multiplication skill is used frequently in many real-life situations, especially those involving money, measurements, and counting large quantities. These are often presented as word problems in exams.
- Money: Calculating the total price of 10 items that each cost ₹50 (10 × 50 = ₹500).
- Measurement: Finding the total weight of 100 packets that each weigh 5 grams (100 × 5 = 500 grams).
- Counting: Figuring out how many seats are in a hall with 30 rows of 100 seats each (30 × 100 = 3000 seats).
10. What grade is this worksheet for?
This worksheet is specifically designed for Grade 4 students. The exercises and concepts are aligned with the Class 4 maths curriculum followed by major educational boards like CBSE. It focuses on the key topic of multiplying whole numbers by multiples of ten, a fundamental skill at this level.

















