Question

Which of the following statements is true ?
(a) Natural numbers are associative for division
(b) Whole numbers are associative for division
(c) Integers are associative for division
(d) Rational numbers are not associative for division.
Question 13.
0 is not
(a) a natural number
(b) a whole number
(c) an integer
(d) a rational number.
Question 14.
12 is 2
(a) a natural number
(b) a whole number
(c) an integer
(d) a rational number.
Question 15.
a + b = b + a is called
(a) commutative law of addition
(b) associative law of addition
(c) distributive law of addition
(d) none of these.
Question 16.
a × b = b × a is called


Worksheet
2
(a) commutative law for addition
(b) commutative law for multiplication
(c) associative law for addition
id) associative law for multiplication.
Question 17.
(a + b) + c = a + (b + c) is called
(a) commutative law for multiplication
(b) commutative law for addition
(c) associative law for addition
id) associative law for multiplication.
Question 18.
a × (b × c) = (a × b) × c is called
(a) associative law for addition
(b) associative law for multiplication
(c) commutative law for addition
(d) commutative law for multiplication.
Question 19.
a(b + c) = ab + ac is called
(a) commutative law
(b) associative law
(c) distributive law
(d) none of these.
Question 20.
The additive identity for rational numbers is
(a) 1
(b) -1
(c) 0
(d) none of these

Answer 1

Answer:

1(a) Natural numbers are associative for division

Answer 2

Find the actual and estimated sum of 1, 45,309 and 2, 86,965 to the nearest..