Unit Test (Solutions) : Thousands Around Us | Mathematics for Class 4 (Maths Mela: New NCERT) PDF Download

Total Marks: 20
Attempt all questions.

• Question numbers 1 to 4 carry 1 mark each.
• Question numbers 5 to 9 carry 2 marks each.
• Question numbers 10 to 11 carry 3 marks each.

Q1. What is the place value of the digit 5 in the number 1,567? (1 mark)
a) Ones
b) Tens
c) Hundreds
d) Thousands
Ans: c) Hundreds
The digit 5 is in the third position from the right in 1,567, which is the hundreds place. 

Q2. How many hundreds make one thousand? (1 mark)
a) 5
b) 10
c) 100
d) 1000
Ans: b) 10
Ten hundreds (10 × 100) equal one thousand (1,000).

Q3. Which symbol shows that one number is greater than another?(1 mark)
a) =
b) <
c) >
d) +
Ans: c) >
The symbol > means "greater than

Q4. What is the expanded form of 1000? (1 mark)
a) 100 + 0 + 0 + 0
b) 1 + 0 + 0 + 0
c) 1000 + 0 + 0 + 0
d) 10 + 00 + 0
Ans: c) 1000 + 0 + 0 + 0
The number 1000 is written as 1 thousand + 0 hundreds + 0 tens + 0 ones in expanded form.

Q5. Using the place value chart, break down the number 2,345 into thousands, hundreds, tens, and ones. (2 marks)
Ans:

Q6. Compare the numbers 1,234 and 1,243 using the correct symbol (<, >, or =). Explain why.  (2 marks)
Ans: 1,234 < 1,243.
Both numbers have 1 thousand and 2 hundreds. Comparing the tens place, 3 tens (in 1,234) is less than 4 tens (in 1,243).

Q7. If you have 12 tens, how many hundreds and tens will you have after regrouping? Show with a simple example.  (2 marks)
Ans: 12 tens = 1 hundred + 2 tens.
Example: 12 tens is 120. Since 10 tens make 1 hundred (100), the remaining 2 tens make 20. So, 120 = 1 hundred + 2 tens.

Q8. Write the number that comes just after 999. Explain how you know it is 1 thousand.  (2 marks)
Ans: The number after 999 is 1,000.
After 9 hundreds, 9 tens, and 9 ones, adding 1 more one makes 10 hundreds, which is 1 thousand (1,000).

Q9. Arrange the numbers 1,025, 1,005, and 1,050 in ascending order (smallest to largest).  (2 marks)
Ans: Ascending order: 1,005; 1,025; 1,050.
All have 1 thousand. Comparing hundreds and tens: 0 hundreds 0 tens (1,005) < 0 hundreds 2 tens (1,025) < 0 hundreds 5 tens (1,050).

Q10. Write the number 3,214 in expanded form. Then, identify the place value of each digit and show how they add up to make the number.  ( 3 marks)
Ans:

• Expanded form: 3,214 = 3,000 + 200 + 10 + 4

• 3 is in the thousands place → 3 × 1,000 = 3,000

• 2 is in the hundreds place → 2 × 100 = 200

• 1 is in the tens place → 1 × 10 = 10

• 4 is in the ones place → 4 × 1 = 4

• Adding: 3,000 + 200 + 10 + 4 = 3,214

Q11. In a school fair, 125, 230, and 345 students visited at different times. Add these numbers step by step to find the total number of students. Show each step clearly.  ( 3 marks)
Ans:
Step 1: 125 + 230 = 355

• Hundreds: 1 + 2 = 3
• Tens: 2 + 3 = 5
• Ones: 5 + 0 = 5
  Step 2: 355 + 345 = 700
• Hundreds: 3 + 3 = 6
• Tens: 5 + 4 = 9
• Ones: 5 + 5 = 10 (regroup 10 ones as 1 ten, so add 1 to tens: 9 + 1 = 10 tens, regroup as 1 hundred, so hundreds: 6 + 1 = 7, tens: 0)
  Total: 700 students.