Let's find the difference of 10 and 5.
10 – 5 = ?
Count back from the bigger number.
Let’s start from 10 and count back 5:
10, 9, 8, 7, 6, 5
10 – 5 = 5
So, the difference of 10 and 5 is 5.
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The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21 is the smallest number.