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Step 1: Make a fraction.

What is the decimal for 45 minutes?

(Please don't say 0.45!!!)

Remember that there are 60 minutes in an hour. Since 60 minutes = 1 hour, we can create a fraction with 60 as the denominator.

In this case:

__45__

60

Or in more general (algebraic) terms:

__m __ if m = number of minutes

60

Once you have a fraction, it is time to convert to a decimal.

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Step 3: Find your answer.

Since

__45__ = 45 / 60 = 0.75

60

The answer should be 0.75 parts of an hour,

but what if I divided wrong?

Better check my work.

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Step 4: Using benchmarks to estimate or check your answer

Think back early elementary school when you were first learning about fractions. Remember when you were first cutting up a circle. You probably had these pieces.

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So change these to decimals

Picture 1 shows

__1__ = 0.25

4

Picture 2 shows

__1__ = 0.5

2

Picture 3 shows

__3__ = 0.75

4

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Find your clock (estimate, if needed).

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Check your answer!

Since 45 minutes is like the 3/4 clock,

45 minutes = 0.75.

Yes! That matches the answer from dividing!