Express the largest of numbers below as a decimal.

Question

Square root of 2 1/4 , (1.2)^2 , square root of 2.56

Answer 1

2 1/4 = 9/4. The square root is 3/2, or 1.5.

 

1.2 squared is 1.44.

 

The square root of 2.56 is 1.6.

 

Which is the largest??

Answer 2

Write each number as a rational number.  This will give you a hint to see which one is the largest.

 

 

√(2 1/4) =

 

√(9/4) =

 

3/2

 

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(1.2)² = 1.44

 

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√(2.56) =

 

√(2 56/100) =

 

√(256 / 100) =

 

16 / 10