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Q1. What is the correct numeral for "Seventy-six crore twenty-three lakh forty-five thousand eight hundred nine"?
(a) 76,23,45,809
(b) 76,23,45,890
(c) 76,23,54,809
(d) 76,32,45,809
Ans: (a) 76,23,45,809
In the Indian numbering system, we separate numbers into periods (groups) using commas.
Now, let’s add them together:
Start with 76 crore → 76,00,00,000
Add 23 lakh → + 23,00,000
Now: 76,23,00,000
Add 45 thousand → + 45,000
Now: 76,23,45,000
Add 809 → + 809
Final number: 76,23,45,809
Q2. Which of the following is the expanded form of 45,76,90,213?
(a) 40,00,00,000 + 5,00,00,000 + 70,00,000 + 6,00,000 + 90,000 + 200 + 10 + 3
(b) 4,00,00,00,000 + 50,00,00,000 + 7,00,00,000 + 60,00,000 + 9,00,000 + 0 + 200 + 10 + 3
(c) 40,00,00,000 + 5,00,00,000 + 7,00,00,000 + 6,00,000 + 9,000 + 200 + 10 + 3
(d) 4,00,00,00,000 + 5,00,00,000 + 7,00,000 + 6,00,000 + 90,000 + 0 + 200 + 10 + 3
Ans: (a)
The expanded form of a number breaks it into the sum of each digit multiplied by its place value.
Now, add all the terms
= 40,00,00,000 + 5,00,00,000 + 70,00,000 + 6,00,000 + 90,000 + 200 + 10 + 3
Q3. Which number is greater: 5,67,89,432 or 5,67,98,432?
(a) 5,67,89,432
(b) 5,67,98,432
(c) Both are equal
(d) Cannot be compared
Ans: (b) 5,67,98,432
5,67,98,432 > 5,67,89,432 because 98 thousand > 89 thousand.
Q4. What is the difference between the population of Greater Mumbai (1,63,68,084) and Chennai (64,24,624)?
(a) 99,43,460
(b) 1,00,00,000
(c) 98,43,460
(d) 99,53,460
Ans: (a) 99,43,460
Q5. Which is the smallest 6-digit number formed using digits 3, 0, 9, 5, 2, 7 without repetition?
(a) 023579
(b) 203579
(c) 302579
(d) 975320
Ans: (b) 203579
Place the smallest non-zero digit (2) first, followed by ascending order: 0, 3, 5, 7, 9.
Q6. Add 44,71,214 and 31,27,510. What is the sum?
(a) 75,98,724
(b) 76,98,724
(c) 75,98,824
(d) 76,08,724
Ans: (a) 75,98,724
Q7. How is 10 lakh written in the International System?
(a) 1 million
(b) 10 million
(c) 100 million
(d) 1 billion
Ans: (a) 1 million
10 lakh = 1,000,000 = 1 million.
Q8. Arrange in descending order: 3,45,67,890; 9,87,65,432; 1,23,45,678; 5,55,55,555.
(a) 9,87,65,432 > 5,55,55,555 > 3,45,67,890 > 1,23,45,678
(b) 9,87,65,432 > 3,45,67,890 > 5,55,55,555 > 1,23,45,678
(c) 1,23,45,678 > 3,45,67,890 > 5,55,55,555 > 9,87,65,432
(d) 5,55,55,555 > 9,87,65,432 > 3,45,67,890 > 1,23,45,678
Ans: (a)
Compare digits from left: 9 > 5 > 3 > 1.
Q9. What is the numeral for "Six hundred ninety million four hundred forty-one thousand six hundred twenty-seven"?
(a) 69,04,41,627
(b) 690,441,627
(c) 6,90,44,16,27
(d) 69,44,16,27
Ans: (b) 690,441,627
International System uses commas after every 3 digits.
Q10. Subtract 65,24,89,07 from 86,16,52,81. What is the result?
(a) 20,91,63,74
(b) 20,91,63,83
(c) 20,61,93,74
(d) 20,91,63,47
Ans: (a) 20,91,63,74
86,16,52,81 – 65,24,89,07 = 20,91,63,74.
The document Computation Operations | Math Olympiad for Class 5 is a part of the Class 5 Course Math Olympiad for Class 5.
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FAQs on Computation Operations - Math Olympiad for Class 5
| 1. What are computation operations in mathematics? |  |
| 2. How do I teach my child basic computation operations? | |
Ans. To teach your child basic computation operations, start with simple, concrete examples using everyday objects, like fruits or toys. Use visual aids, such as number lines or counters, to illustrate the concepts. Practice regularly with worksheets or math games that reinforce these skills in a fun and engaging way.
| 3. What is the importance of learning computation operations in Class 5? | |
Ans. Learning computation operations in Class 5 is crucial as it lays the foundation for more advanced math concepts in later grades. It helps students develop problem-solving skills, enhances their critical thinking abilities, and prepares them for real-life situations involving calculations, such as budgeting or measuring.
| 4. Can computation operations be applied in real life? | |
Ans. Yes, computation operations are widely used in everyday life. For instance, we use addition when shopping to calculate total costs, subtraction for finding change, multiplication for understanding rates (like speed or price per item), and division when sharing items equally. These operations help us make informed decisions.
| 5. How can I improve my child's speed and accuracy in computation operations? | |
Ans. To improve your child's speed and accuracy in computation operations, encourage regular practice through timed quizzes and math drills. Use online resources or apps that offer interactive math games. Additionally, establish a routine where they can practice mental math daily, which helps enhance their calculation speed and confidence.
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