Class 7 Maths Chapter 1 Very Short Question Answer - Large Numbers Around Us

Q1: Rounding 4,78,942 to the nearest thousand gives ______.

Ans: 4,79,000

As 942 is greater than 500 so we round up

Q2: Convert 7,300,000 into the Indian number system.

Ans: 73,00,000 (Seventy-three lakh)

Q3: Write the following numbers in Indian Place Value Notation: 

One crore one lakh one thousand ten 

Ans: 1,01,01,010

Step-by-step (Indian Number System):

• One crore = 1,00,00,000

• One lakh = 1,00,000

• One thousand = 1,000

• Ten = 10

• Now add them all, we get: 1,01,01,010

Q4: True or False: 1 crore = 100 lakhs

Ans: True

1 crore = 100 lakhs.

Q5: Write the numbers 6,345,210 in words using the International system.

Ans: Six million three hundred forty-five thousand two hundred ten

Q6: Round 3,19,612 to the nearest ten thousand.

Ans: 3,20,000

(Since the thousands digit is 9, we round up)

Q7: Using any digits from 0 to 9 without repeating, write the greatest 5-digit number that is a multiple of 5.

Ans: 

A number is divisible by 5 if it ends in 0 or 5.
For maximum value, use the largest digits: 9, 8, 7, 6.
Case 1: Ends in 5: 98765 (digits 9, 8, 7, 6, 5, distinct, divisible by 5).
Case 2: Ends in 0: 98760 (digits 9, 8, 7, 6, 0, distinct, divisible by 5).
Compare: 98765 > 98760 (5 > 0 in units).
So, 98765 is the greatest 5-digit number that is a multiple of 5.

Q8: Calculate the product in a quick way

116 x 5

Ans:

116 x (10/2) as 10/2 = 5
58 x 10
580

Q9: Arrange the following in ascending order: 45,210; 54,120; 40,250; 49,500

Ans: 40,250 < 45,210 < 49,500 < 54,120

Q10: Convert 5,42,36,789 into words using the Indian number system.

Ans: Break it into crores, lakhs, thousands, hundreds, and tens/units before writing in words.

• Crores: 5 → 5 crore
• Lakhs: 42 → 42 lakh
• Thousands: 36 → 36 thousand
• Hundreds, tens, units: 789 → seven hundred eighty-nine

Five crore forty-two lakh thirty-six thousand seven hundred eighty-nine.