๐งฑ Ones, tens and hundreds
๐ข Math ยท Numbers๐ Year 1 โ Year 4
A small cube is one, a rod is ten and a flat is a hundred. Read the number, or build it yourself.
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About โOnes, tens and hundredsโ
A digit's value depends on its place: the 3 in 35 means three tens, and in 350 three hundreds. The child sees it with their own eyes: a hundred flat holds ten rods, and a rod ten cubes.
In the โBuild the numberโ exercise the child adds flats, rods and cubes with the + and โ buttons, watches the number take shape, then checks. That's how they understand why we write 207 and not 27 when there are no tens.