Count a large group of objects by counting tens and ones
Lesson 4 / 5
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I can count larger groups of objects efficiently using tens and ones to help me.
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One item can be used to represent several other items. This is called unitising.
The order in which tens and ones are arranged does not affect the value of the number.
We can use a one hundred square to help find the value of two-digit numbers more efficiently.
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