105k views
3 votes
Regrouping 21 ones are regrouped as 1 ten and 2 ones

User Nebenmir
by
6.9k points

2 Answers

3 votes
2 tens equal 20 and 1 = 21
User Hal
by
6.6k points
3 votes
Regrouping 21 ones are regrouped as 2 tens and 1 ones.

10
10
01
---
21
User Ladookie
by
6.4k points
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