mahmudheather mahmudheather
  • 19-10-2017
  • Mathematics
contestada

Use estimation to determine which of the following expressions is greater. Explain how you got your answer. 5×( 1.9 + 3.15) and 6.9 × (0.2 + 3.2)

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altavistard
altavistard altavistard
  • 19-10-2017
Let's round off 5×( 1.9 + 3.15):  We get 5(2 + 3) = 5(5) = 25

Let's also round off 6.9 × (0.2 + 3.2)L  We get 7(0+3) = 21

The first expression is greater.
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