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Question 15 Marks
Match the following:
$1.$
$625 \times 436 = 625 \times 400 + 625 \times 30 + 625 \times 6$
$a$
Commutativity under addition.
$2.$
$25 \times 69 \times 8 = 25 \times 8 \times 69$
$b$
Commutativity under multiplication.
$3.$
$60 + 19758 + 840 = 60 + 940 + 19758$
$c$
Distributivity of multiplication over addition.
Answer
$1.$
$625 \times 436 = 625 \times 400 + 625 \times 30 + 625 \times 6$
$a$
Distributive of multiplication over addition.
$2.$
$25 \times 69 \times 8 = 25 \times 8 \times 69$
$b$
Commutative under multiplication.
$3.$
$60 + 19758 + 840 = 60 + 940 + 19758$
$c$
Commutative under addition.
.$i.\ 625 \times 436 = 625 \times (400 + 30 + 6)$
$= 625 \times 400 + 625 \times 30 + 625 \times 6$
This is the distributive law of multiplication over addition.
$ii.\ 25 \times 69 \times 8$
$= 25 \times 8 \times 69$
This is the commutative law of multiplication
$iii.\ 60 + 19758 + 840$
$= 60 + 940 + 19758$
This is the commutative law of addition.
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