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Question

Which of the following will have the same product as 3.97 x 4.6?


  1. 3.97 x 46

  2. 39.7 x 0.46

  3. 39.7 x 4.6

  4. 397 x 0.046


Solution

The correct options are
B

39.7 x 0.46


D

397 x 0.046


We need to check the number of digits after the decimal point in all the options given.

3.97 x 4.6 has 3 digits after the decimal point, hence its product will be the same as 39.7 x 0.46 and 397 x 0.046 as they all have a total of 3 digits after the decimal point.

39.7 x 4.6 and 3.97 x 46 both have 2 digits after the decimal point , hence their product will be different from 3.97 x 4.6

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