Verified Answer :

The compatible numbers (numbers you can easily use and calculate in your head) for 48 and 123 would be 50 and 100. 50 x 100= 5,000. Rounding would be 50 and 120. 50 x 120= 6,000. So rounding would provide a closer estimate.

fichoh

Comparing rounding and compatible number, rounding gives a closer estimate than compatible number.

Using compatible numbers :

  • 48 = 50
  • 123 = 100

50 × 100 = 5000

By rounding :

  • 48 = 50
  • 123 = 120

50 × 120 = 6000

6000 is closer to the actual value of the product than 5000 ;

Therefore, rounding gives a closer estimate than compatible number.

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