There are 34.5 tens in 345.
There are 10 tens in 100, and so 30 tens in 300.
There are 4 tens in 40, and 5 is half of a ten.
Or, whenever you are working with tens, you can just move the decimal point one spot to the left.
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Each digit ('number') in 345 has a different place value. The '3' is in the hundreds place, so it's worth 300 . The '4' is in the tens place, so it's worth 40 . The '5' is in the ones place, so it's worth 5 .
295 to the nerrest ten
345 ÷ 15 = 23
300
How many tens are in 72539.7 tens39.5 tens100,000 tens.34.8