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Numbers & Operations — Chapter Test

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Q1
In 3,45,678, which digit is in the Lakhs place?
The leftmost digit 3 is in the Lakhs place.
Q2
If 12 × 10 = 120, then 12 × 100 = ___ ?
Multiplying by 100 adds two zeros: 1,200.
Q3
Round 6,750 to the nearest thousand.
The hundreds digit 7 is 5 or more, so it rounds up to 7,000.
Q4
Which is the largest number?
90,000 is greater than all the others.
Q5
What is the place value of 6 in 6,54,321?
6 is in the Lakhs place, so its value is 6,00,000.
Q6
Add: 35,420 + 24,580 = ?
35,420 + 24,580 = 60,000.
Q7
Subtract: 70,000 − 28,500 = ?
70,000 − 28,500 = 41,500.
Q8
Multiply: 423 × 21 = ?
423 × 20 = 8,460 and 423 × 1 = 423, so 8,460 + 423 = 8,883.
Q9
Multiply: 2,345 × 4 = ?
4 × 2,345 = 9,380.
Q10
A factory makes 1,250 toys each day. How many toys in 4 days?
1,250 × 4 = 5,000 toys.
Q11
A man earns ₹45,000 a month and spends ₹32,500. How much does he save?
45,000 − 32,500 = ₹12,500.
Q12
720 students travel in 6 buses, equally shared. How many in each bus?
720 ÷ 6 = 120 students.
Q13
What is the smallest 6-digit number minus the largest 5-digit number?
1,00,000 − 99,999 = 1.
Q14
An auditorium has 48 rows with 25 seats each. How many seats in total?
48 × 25 = 1,200 seats.
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