Question

A. Tick (v) the correct option.
1. When a number is multiplied by
the result is the number itself
(a) 0
(b) 1
b
(c) number itself (d) none of these
2. The property used in (19 x 18) ~ 23 = 19 x (18 x 23) is
(a) Closure
(b) Commutative for multiplication
(c) Associative for multiplication
(d) none of these
3. If a = 3, b = 4 and c = 5, then the value of a (b + c) is
(a) 12
(b) 60
(c) 23
(d) none of these
B. Fill in the blanks.
are
1. Two whole numbers which when multiplied with themselves give the same number
and
2.
is the additive identity for the whole numbers.
3.
is the multiplicative identity for whole numbers.
4. The natural numbers are not commutative under
and
C. Match the columns.
1. 425 × 136 = 425 x (6 + 30 + 100) (a) Commutativity under multiplication
2. 49 x 50 = 50 x 49
(b) Commutativity under addition
3. 2005 + 20 = 20 + 2005
(c) Associativity under multiplication
4. (6 x 5) x 3 = 6 x (5 x 3)
(d) Distributivity of multiplication over addition
Cind the product by a suitable rearrangement:​

Answer 1

Answer:

Set A

1.option b)

2.option b)

3.option d)

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Answer 2

Answer:

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