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Today you'll learn what tenths and hundredths are, how to read a decimal, and how to tell which of two decimals is bigger.

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Let's go!

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Imagine a chocolate bar cut into 10 equal pieces.

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Each piece is one tenth, written as 0.1.

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If you eat 3 pieces, you've eaten three tenths, or 0.3!

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Now picture a big square cut into 100 tiny equal squares.

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Each one is a hundredth, written as 0.01.

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Money works the same way:

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a dollar has 100 cents, so 25 cents is written $0.25.

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The dot in a decimal is called the decimal point.

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Whole numbers sit on its left.

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The first digit on its right is the tenths place, and the second is the hundredths place.

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Let's read some decimals.

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0.4 is four tenths, and 0.45 is forty-five hundredths.

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2.07 is two and seven hundredths, because the tenths place holds a zero.

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To find the bigger decimal, first line up the decimal points.

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Next, add a zero so both have the same number of digits, because 0.5 is the same as 0.50.

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Then compare from left to right until the digits are different.

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Which is bigger, 0.5 or 0.38?

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Write 0.5 as 0.50, then look at the tenths:

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5 is bigger than 3.

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So 0.5 wins, even though 38 looks bigger than 5!

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Some people think a decimal with more digits is always bigger.

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That's not true!

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0.9 is bigger than 0.85, because 9 tenths is more than 8 tenths, just like 90 cents is more than 85 cents.

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Time for a quick check!

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How do you write seven tenths as a decimal?

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It's 0.7.

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Which is bigger:

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0.6 or 0.59?

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It's 0.6, because 6 tenths is more than 5 tenths.

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Now put 0.3, 0.25 and 0.4 in order from smallest to biggest.

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The answer is 0.25, 0.3, 0.4.

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Great job today, decimal detectives — see you next time!