Q1 of 20 Page 43

Which of the following will not represents zero:

(a) 1 + 0 (b) 0 × 0


(c) (d)

(a) 1 + 0 = 1


It does not represent 0.


(b) 0×0 = 0


It does represent 0.


(c) = 0


It does represent 0.


(d) = 0


It does represent 0.


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6

A vendor supplies 32 litres of milk to a hotel in the morning and 68 litres of milk in the evening. If the milk costs Rs. 15 per litre, how much money is due to the vendor per day?

 7

Match the following:

(i) 425 × 136 = 425 × (6+30+100)

(a) Commutativity of multiplication.

(ii) 2 × 49 × 50 = 2 × 50 × 49

(b) Commutativity of addition

(iii) 80 + 2005 + 20 = 80 + 20 + 2005

(c) Distributivity of multiplication over addition

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If the product of two whole numbers is zero, can we say that one or both of them will be zero? Justify through examples.

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If the product of two whole numbers is 1, can we say that one or both of them will be 1? Justify through examples.