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200 x 8 x 5 x 4 x 10 =

 Mar 3, 2019
 #1
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200 x 8 x 5 x 4 x 10 =  

 

The answer, of course, is 320,000

 

You can multiply the numbers one after another manually,

 

Or you can do it the easy way, with a calculator,

 

Or you can do it in your head:

look at the whole thing at once,

and recognize that 5 times 4 is 20,

then times the 10 takes it up to 200 

which gives you 200 x 8 x 200. 

You square 200 for 40,000,

then that times 8 gives you 320,000.

The hardest part is keeping up with the number of zeros.

 Mar 3, 2019

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