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6 tens
To calculate 67 tens plus 10 tens, you first convert the tens into their numerical values. This gives you 670 (from 67 tens) plus 100 (from 10 tens), which equals 770. Therefore, 67 tens plus 10 tens equals 770.
3 tens is written as 30 0 tens is written a 0
How many tens are there in 1700?
72 tens