Mai will have 4 hundred if she has 40 tens.
What are digits?
In a positional numeral system, a numerical digit is a single sign that can be used singly or in combination to represent numbers.
A digit is a part of a set that, when combined, makes up a numeration system.
For example 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 are digits.
Given that,
Mai has 40 tens
So,
1 ten + 1 ten + 1 ten ... till 40 times
⇒ 10 + 10 + 10 ... till 40 times
⇒ 40(10)
⇒ 400
⇒ 100 + 100 + 100 + 100
So, Mai will have 4 hundred.
Hence "Mai will have 4 hundred if she has 40 tens".
To learn more about digits,
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