340
By ones By twos By fours By eights By tens By twenties By fourty (if you want to count that one)
There are not more tens. The cardinality ("count") of the set of tens is exactly the same as the cardinality of the set of hundreds. The mapping f(x) = 10x where x is a multiple of 10 is bijective. Consequently, its domain and range are of the same "size". The words "count" and "size" are in quotation marks because the relevant values are infinite.
It is only because we count in tens - and 5 10 and 2 are factors.
28
8 tens 2 ones
340
by colour coding them and solve them in tens
you pick the nearest number you can count when you count by tens such as 52 rounds to 50 because 5 and under will go to the ten before and 6 and higher will go to the next ten
By ones By twos By fours By eights By tens By twenties By fourty (if you want to count that one)
(400 + 200) - 30 = 570
The fact that we count in tens. This is due to the fact that we have ten digits on our hands.
Quite possibly because humans have ten fingers (including thumbs).
There are not more tens. The cardinality ("count") of the set of tens is exactly the same as the cardinality of the set of hundreds. The mapping f(x) = 10x where x is a multiple of 10 is bijective. Consequently, its domain and range are of the same "size". The words "count" and "size" are in quotation marks because the relevant values are infinite.
It is only because we count in tens - and 5 10 and 2 are factors.
There are 98 tens in 988. This is because there are 9 hundreds in 988, and each hundred is equivalent to 10 tens. Therefore, 9 x 10 = 90 tens. Additionally, the remaining 8 tens in 988 complete the total count of 98 tens in the number.
Well, honey, if you've got 15 tens, you've got yourself the number 150. It's as simple as that. No need to overcomplicate things, just count those tens and you'll have your answer.