Page 28 - Math 7

Number Systems in Diff erent Bases

2. Let's write the numerals which have the following expanded forms.

a) 2 × 10 + 4 × 10 + 7 × 10 + 5 × 10 = ..........................................
0
2
3
1
b) 7 × 10 + 5 × 10 + 9 × 10 + 8 × 10 = ..........................................
1
4
0
2
c) 4 × 10 + 6 × 10 + 1 × 10 + 7 × 10 = ..........................................
0
5
4
1
6
2
d) 9 × 10 +3 × 10 + 5 × 10 0 = ..........................................
3. a) If x is the digit at tens place and y is the digit at ones place, the two-digit
number formed by these digits is ..............................................
b) If y is the digit at tens place and x is the digit at ones place, the two-digit
number formed by these digits is ..............................................
c) If a is digit at hundreds place, b is at tens place and c is at ones place, the
three-digit number formed by these digit is ..............................................
4. Rewrite these numerals using commas in Nepali system and in International
system.

Numerals Nepali system International system
a) 18576390
b) 420198675

c) 99999999999

Creative Section A
5. a) The estimated cost of construction of a hydro-power project is
Rs 2562880000. Rewrite this cost in words in Nepali as well as International
numeration system.
b) The world population estimated by US Census Bureau in June 2019 was
7577130400. Rewrite this population in words according to Nepali numeration
system.
c) The annual budget of Government of Nepal was Rs 1315161700000 in the
fiscal year 2075/076. Rewrite it in words according to Nepali and International
system.
6. Rewrite these number names in numerals using commas both in Nepali system
and International system.
a) Six kharab eighty-four arab ninety-one crore forty-seven lakh five thousand
three hundred forty.
b) Thirty-seven billion eight hundred fifteen million six hundred sixty-eight
thousand five hundred twenty-one.
7. Let's write the following numbers in the expanded forms:
a) 52063709 b) 400801530 c) 7502600048 d) 23900068407

Vedanta Excel in Mathematics - Book 7 26 Approved by Curriculum Development Centre, Sanothimi, Bhaktapur