Subtracting Two Numbers Within 20
Let's find the difference of 5 and 3.
5 – 3 = ?
First, count the total number of turtles.
There are five turtles.
Now count the number of turtles which are crossed.
Out of 5 turtles, 3 are crossed.
Remaining number of turtles = 2
5 – 3 = 2
So, the difference of 5 and 3 is 2.
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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.