Seudónimo Seudónimo

26-10-2016
Mathematics

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Regrouping 21 ones are regrouped as 1 ten and 2 ones

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Аноним Аноним

26-10-2016

Regrouping 21 ones are regrouped as 2 tens and 1 ones.

10
10
01
---
21

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Аноним Аноним

26-10-2016

2 tens equal 20 and 1 = 21

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