Exercise: 1-F
MENTAL MATHS
Q1: Fill in the blanks:
i. The absolute value of any integer can never be
Answer: negative
ii. The sum of any integer and its additive inverse is always
Answer: 0
iii. a×(b+c)=(a×b)+(a×c) is
Answer: Distributive property
iv. The product of two integers having unlike signs is always a
Answer: negative integer.
v. The additive inverse of an integer a has the
Answer: opposite sign as a.
Q2: Write true (T) or false (F):
i. For any integer a, the multiplicative inverse is 1.
Answer: False
ii. The sum of two integers having unlike signs is always a positive integer.
Answer: False
iii. The multiplicative inverse of an integer is never an integer.
Answer: False
iv. Any integer multiplied to its multiplicative inverse always gives the multiplicative identity.
Answer: True
v. Every integer has a multiplicative inverse.
Answer: False
vi. The quotient of two integers with unlike signs is always negative.
Answer: True
