Question

Q19. Multiplication of 2,-5 and 0 gives
(a) 10
(b) 0
(c)-10
(d) 7
Q20. Identify the property used in the following:
2 13+ 8 13 = (2+8) X 13
(a) Commutative (b) Closure
(c) Associative (d) Distributive
Q21. Which number is multiplicative identity for the whole numbers?
(a) o
(b) 1
(c) 2
(d) 3​

Answer 1

1. 0

2. Associative property

3. 1

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GN

Answer 2

Q. 19 :

2 × - 5 = - 10

-10 × 0 = 0

Option (b) : 0

Q. 20 :

(2 × 13) + (8 × 13) = (2 + 8) × 13

suits good to

(a × c) + (b × c) = (a + b) × c

which is called the distributive property

Option (d) : Distributive

Q. 21 :

The multiplicative identity of whole numbers is 1. This means that any whole number multiplied by 1 will equal that same whole number

Option (b) : 1

Hope that helps u out :)

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