What is the thrice of multiplicative identity for whole numbers?

A milkman supplies $34 L$ of full cream milk and $54 L$ of toned milk every day in Palam Vihar. The toned milk costs $₹48$ per liter and full cream milk costs $₹56$ per liter. How much money the milk man will earn in the month of June?

Which of the following properties is shown in the given expression?

$72\left(4+5\right)=72\times 4+72\times 5$

Using distributive property, $258\times 1008=?$

Which of the following does not represent zero?

 Fill the blanks.

(i) Predecessor of smallest $3-$digit number is $P$

(ii) $Q$ is the multiplicative identity of the whole numbers

(iii) $R$ is the additive identity of whole numbers.

(iv) $S$ is the only whole number which does not have predecessor.

Fill in the blanks.

Every natural number has a _____ except _____ and has a _____.