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Decimals

Grade 4 · Math · Free lesson

Hey there! Today we are going to explore the wonderful world of decimals. Decimals are just a super cool way to show numbers that are smaller than one whole!

Imagine you have a delicious, whole chocolate bar. If you cut it into 10 equal pieces, each piece is called one-tenth. In math, we write this as 0.1!

The secret key to decimals is the decimal point. It sits quietly to the right of the ones place, acting like a bridge between whole numbers and tiny parts!

0.6WholeParts

If we divide that same chocolate bar into 100 tiny crumbs, each crumb is one-hundredth, written as 0.01. It takes one hundred of these crumbs to make one whole bar!

3 out of 100 shaded = 0.03
✏️ Worked example

Let's write 'four tenths' and 'seven hundredths' as decimals!

  1. Think about 'four tenths' first. Tenths are the very first spot to the right of the decimal point.
  2. Put a 4 in that tenths spot: 0.4.
  3. Now think about 'seven hundredths'. Hundredths are the second spot to the right of the decimal point.
  4. Since there are no tenths mentioned, we put a 0 in the tenths spot as a placeholder.
  5. Put the 7 in the hundredths spot to get: 0.07!
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