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Sorry if it's a bother, but what's the answer to these? I'm having a little bit of trouble.

Sorry if it's a bother, but what's the answer to these? I'm having a little bit of-example-1
User Paul Rohde
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1 Answer

3 votes

Solution (a):

~Let's change 9.9² to 10² since we have to estimate.~

We know that:

  • 10² = 100
  • Given expression: 9.9² × 1.79

Solving the expression:

  • 9.9² × 1.79
  • => 10² × 1.79
  • => 100 × 1.79
  • => 179

The estimated value of 9.9² × 1.79 is 179.

Solution (b):

~Let's change √97.5 to √100 and 1.96 to 2 since we have to estimate.~

We know that:

  • √100 = 10
  • Given expression: √97.5 ÷ 1.96

Solving the expression:

  • √97.5 ÷ 1.96
  • => √100 ÷ 2
  • => 10 ÷ 2
  • => 5

The estimated value of √97.5 ÷ 1.96 is 5.

User Ehud
by
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