Natalia wrote a multiplication problem that had four decimal places in the product.Which problem could she have written?

Question

Natalia write a multiplication problem that had four decimal places in the product.Which problem could she have written?

Answer 1

Chris:

 

When multiplying two numbers, the number of decimal places in the product is equal to the sum of the decimal places in the two numbers being multiplied. 

 

So, for example 5.28*3.17 which equals 16.7376 contains 2 places in the first number and 2 places in the second number for a total of four places in the final answer.

 

Using this rule, you can come up with a variety of combinations, resulting in four decimal places.  Another example would be 5.728*1.1, which equals 6.3008.

 

Hope this helps.

 

George T.