Consider the subtraction pattern:
7 – 5 = _____
70 – 50 = _____
700 – 500 = _____
To complete this pattern, we find the first missing number.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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.