7+9=16 you can use that cause that is the opposite equation
we know that
Additive identity property:
If we add a real number to zero or add zero to a real number, then we get the same real number back.
The number zero is known as the identity element, or the additive identity.
For example: a+0 =a
we can see that adding gives same result
so, 0 is the additive identity here
Hence , option-B........Answer
18 kg times 5 kg would be 90 kg because each window was 18 kg, hence 90 kg
8 books with 2 sheets each and 1 extra sheet as leftover
