Page 21 - C_GPT _V4 _class_7
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3. Perform the binary subtraction and write the answer in the space given:
a. (1011) from (10000)
2
2
b. (111) from (1111)
2
2
c. (1001) from (10001) 2
2
d. (11110) from (101011)
2
2
4. Competency-based/Application-based questions:
a. Guess my birthdate. I’m born in 9th month of year, my date of birth is “10111” in binary and year is
“11111100111” in binary.
b. Riya is shopping on an online shopping website that offers a discount to customers
who can solve a binary-to-decimal conversion puzzle. The website displays "1111" as
the discount percentage in binary. Help Riya solve this puzzle and determine the
discount percentage.
c. Nimish is performing binary subtraction. He got stuck when he needs to subtract the
digit 1 from the digit 0. Which rule of binary subtraction should he follow to get the
correct result?
d. Priyanshi’s teacher has assigned her the task of calculating the total number of students in her class.
There are 10001 (in binary) boys and 10000 (in binary) girls in the class. Can you help her calculate
the total number of students?
SDG Activity
You are in charge of decorating your school’s Annual Day event with a limited budget.
To ensure efficient use of resources, make a list of supplies with their quantities and
calculate the total cost. Convert the total price into binary and count the number of
digits. Compare whether there are more digits in the decimal or binary representation.
For The Teacher
Talk to the students about the importance of number systems and their uses in computers.
Do a detailed walk-through of the decimal and binary number systems and their different operations in a
mathematically rigorous manner.
Give a brief on octal and hexadecimal number systems.
Number System 19

