CLASS –VII
CHAPTER-1(NUMBER SYSTEM)
Formative Assessment
A. Fill in the blanks:
1. 2
2. Decimal Number
3. 8
4. 10
5. Binary
6. Hexadecimal
7. 0
B. State True or False:
1.
T
2.
F
3.
F
4.
F
5.
F
C.
Application based Questions:
i.
Multiply each octal number with 8 having the
power 0 for unitary position,starting from the extreme right digit.
ii.
Increase the power one by one ,keeping the
base fix. Sum up all products to get decimal number.
2. He can solve this by
borrow method as (10-1=1)
Summative
Assessment
A.
Multiple choice questions:
1.
Aryabhat
2.
Digital Computer
3.
Binary
4.
1
5.
2
B. Answer the following
questions:
1. A system for representing
(that is expressing or writing) numbers of a certain type is called number
system.The types are:
i.
Decimal number system
ii.
Binary number system
iii.
Octal number system
iv.
Hexadecimal number system
2. The rules are:
i.
Divide the given decimal number with the base
2.
ii.
Write down the remainder and divide the
quotient again by 2.
iii.
Repaet the step 2 till the quotient is zero.
3. The rules for multiplication
of two numbers a and b is:
A
|
B
|
A*B=C
|
0
|
0
|
0*0=0
|
0
|
1
|
0*1=0
|
1
|
0
|
1*0=0
|
1
|
1
|
1*1=1
|
4. The octal number system consists of 8
digits i.e 0 to 7 with base 8. in Octal, a binary number is divided up into
groups of only 3 bits, with each group or set of bits having a distinct value
of between 000 (0) and 111 ( 4+2+1 = 7 ).
Representation of an Octal Number
MSB
|
Octal Number
|
LSB
|
||||||
88
|
87
|
86
|
85
|
84
|
83
|
82
|
81
|
80
|
16M
|
2M
|
262k
|
32k
|
4k
|
512
|
64
|
8
|
1
|