Product means multiply. So the product of 72 and 70 is 72x70. The answer is 5040.
One way to do big products like this is do 70x70=4900. This is easy because 7x7=49.
Now as 2x70=140. 4900+140 is 5040.
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Work it out: divide 70 by 72, then multiply by 100. (70/72)*100 = 97.222...%
Closer is a comparative term. Closer than what? 72 is closer to 70 than it is to 70,000,000 72 is not closer to 70 than it is to 73. Alternatively, 72 is closer to 70 than 70,000,000 is 72 is not closer to 70 than 71 is.
Basic maths - 10% is 7.2 multiply that by 7 and you get 50.4 - all without the aid of a calculator !
the product of 8 and 9 is 72
The LCM is 2520.