Easy Tricks to Multiply Whole Tens and Hundreds for Grade 4
FAQs on Multiplying Whole Tens and Hundreds: Class 4 Maths Worksheet
1. How do you multiply by whole tens?
To multiply a whole number by a whole ten (like 20, 30, or 40), you first multiply the non-zero digits and then add the zero back at the end of the answer.
- Step 1: Identify the non-zero digits. For example, in 12 × 30, you would focus on 12 × 3.
- Step 2: Perform the simpler multiplication: 12 × 3 = 36.
- Step 3: Attach the zero from the original problem (from the 30) to the end of your result. The final answer is 360.
2. What is the shortcut for multiplying by hundreds?
The shortcut for multiplying a number by hundreds (like 100, 200, or 300) is to multiply the number by the non-zero digit first, and then add two zeros to the result.
- For a simple case like 45 × 100, you just add two zeros to 45 to get 4500.
- For a problem like 15 × 200, you first calculate 15 × 2 = 30.
- Then, you add the two zeros from 200 to get the final answer: 3000. This is one of the most useful multiplication tricks for Grade 4.
3. Why is it easy to multiply by 10 or 100?
Multiplying by 10 or 100 is easy because our number system is based on tens (the base-10 system), which allows for simple shifts in place value.
- When you multiply a number by 10, every digit shifts one position to the left, making the number ten times larger. We show this by adding a zero at the end (e.g., 58 × 10 = 580).
- When you multiply by 100, every digit shifts two positions to the left, and we add two zeros (e.g., 58 × 100 = 5800).
- This multiplication pattern makes calculations very fast.
4. How does place value help in multiplication?
Place value is the fundamental concept that explains why shortcuts for multiplying by tens and hundreds work.
- Understanding that multiplying by 10 moves a digit from the ones place to the tens place, or tens to hundreds, is crucial.
- It helps students see multiplication not just as a rule to memorise, but as a logical shift in a number's value.
- This strong foundation in place value and multiplication is essential for developing mental maths skills and tackling more complex problems.
5. What skills does this multiplication worksheet build for a Grade 4 student?
This worksheet is designed to build several core mathematical skills for Grade 4 students, going beyond simple memorisation.
- Calculation Fluency: It provides drills to make students faster and more accurate at multiplying numbers.
- Number Sense: It reinforces the understanding of place value and how numbers increase in scale.
- Mental Maths: It encourages using shortcuts for multiplying by 10, 100, and 1000 without writing down steps.
- Conceptual Understanding: It solidifies the connection between multiplication and the base-10 system.
6. Where can I find Class 4 maths worksheets for multiplying by tens and hundreds with answers?
You can find a free Class 4 maths worksheet for multiplying whole tens and hundreds right on this page, available for immediate download.
- The worksheet is a printable PDF designed specifically for Grade 4 students.
- It includes a variety of exercises like drills and fill-in-the-blanks to make practice engaging.
- A complete answer key is provided, making it easy for parents to check their child's work.
7. Is this worksheet printable and does it include an answer key?
Yes, this Grade 4 multiplication worksheet is designed to be easily printable and comes with a full answer key.
- Printable PDF: The worksheet is available in a high-quality PDF format, perfect for printing on A4 paper for use at home or in the classroom.
- Includes Answers: A step-by-step answer key is included with the download, which helps in quickly verifying the solutions and correcting mistakes.
8. What is the main rule for multiplying any number by 10, 100, or 1000?
The main rule is to simply add the same number of zeros to the end of the number as there are in the multiplier (10, 100, or 1000).
- To multiply by 10 (which has one zero), add one zero to the end of your number. (e.g., 93 × 10 = 930)
- To multiply by 100 (which has two zeros), add two zeros. (e.g., 93 × 100 = 9300)
- To multiply by 1000 (which has three zeros), add three zeros. (e.g., 93 × 1000 = 93000)
9. How can I use this worksheet for my child at home?
This worksheet is an excellent resource for parents to support their child's maths learning at home.
- Download and Print: Start by downloading the free printable PDF from this page.
- Guided Practice: Work through the first few questions together to ensure your child understands the method of multiplying by tens and hundreds.
- Independent Revision: Encourage your child to complete the rest of the maths multiplication drills on their own to build confidence.
- Review Together: Use the provided answer key to check the answers and gently correct any errors.
10. What age group is this multiply whole tens hundreds worksheet best for?
This worksheet is specifically designed for Grade 4 students, who are typically between 9 and 10 years old.
- The difficulty level, question types, and font size are all optimised for this age group.
- It aligns with the multiplication concepts taught in the Class 4 Maths syllabus, focusing on building a strong foundation in place value and quick calculation.
