lesson
One hundred equal parts
1 · Learn
One hundredth is 1/100 of a whole, written 0.01. Ten hundredths make one tenth: 0.10 = 0.1.
A 10 by 10 grid has one hundred equal squares. Shading 27 squares represents 27/100, or 0.27. The 2 represents two tenths and the 7 represents seven hundredths.
One tenth is a row of ten squares on our hundred grid. Divide that row into ten equal pieces: each piece is one hundredth of the whole grid. So 0.1 divided by 10 is 0.01. Counting backwards from 0.12 gives 0.11, 0.10, 0.09; the step stays one hundredth across a tenth boundary.
2 · Worked example
Counting up by hundredths from 0.08 gives 0.09, 0.10, 0.11. Crossing a tenth does not change the step size.
3 · Your turn
Write 36/100 as a decimal. Continue 0.97, 0.98, __, __.
Check your answer
0.36; 0.99, 1.00.
4 · Apply your learning
Shade hundred grids and match fractions, decimal labels and tenths-plus-hundredths descriptions.
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Use practical or drawn representations and explain the method. Check units and labels. A correct answer to one example is not evidence of secure fluency; revisit with varied numbers and feedback.
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