Bài 6: Biggest and smallest number

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Hey Starry! We have learnt how to find the smaller and the bigger number from a pair of number.

But if three numbers are given then we have to find the smallest and the biggest number.

Let us first use the number-strip method.

Consider the numbers 5, 16, 11.
Let us first circle these number on the number-strip.

Here is 5, 16, and 11.
Which the number comes first on the number-strip, Starry?

Yes, the number 5 comes first on the number-strip, so number 5 is the smallest.
Number 16 comes last on the number-strip, hence number 16 is the biggest.

Which number is left, Starry? Yes, the number 11 is left.

11 comes between the numbers 5 and 16.

Do you understand, Starry? 

Ok, let’s solve the next example.

Out of 13, 3, and 8 which is the smallest and the biggest number?

What should we do first, Starry?
Yes, we shall first draw the number-strip.

Now, let us circle the numbers. 
13, 3, and 8.
Observe the numbers carefully, Starry.

tell me which number comes first on the number-strip?

Yes, number 3 comes first on the number-strip.
So 3 is the smallest number.

The number 13 comes last.
So it is the biggest number.

Number 8 will be in between the two numbers. 
Ok, Starry.

Now look at the numbers circled in the given number-strip and fill in the boxes.

1. _____ is the number that comes first. Can you answer it Starry?

Yes, 14 is the number that comes first. So, 14 is the smallest number.

2. Number 22 comes ____ . Yeah, number 22 comes last. So, number 22 is the biggest number.

Let us now learn how to find the smallest and the biggest number by using the square of 100.

Look at the square of 100, Starry. 
Now look at these three numbers highlighted in the same column.

The numbers are 69, 62, and 65. Which number comes first in this column Starry?

Yeah, number 62 comes first, so 62 is the smallest number.
Out of 69, 62, and 65.

The number 69 comes last.
So, 69 is the biggest number.
Isn’t it easy?

Let us solve the next example.

Find the smallest and the biggest number out of 47, 77, and 17.
What do you observe Starry?

Yes, all the number  47, 77 and 17 are from the same row.

17 comes first, so 17 is the smallest number.

77 comes last, so 77 is the biggest number.

Now, will you be able to solve the next example?

Out of 45, 18, and 37 which is the smallest and the biggest number?

Hey, Starry see all these number are from different column.

Number 18 is from the column that comes first. So the number 18 is the smallest.

45 is from the column that comes last. So the number 45 is the biggest.

Here is one last example Starry.
Which is the smallest number out of 71, 17, and 77?

Yes, number 17 is the smallest as it comes in the column which comes first in the number square.

So Starry, you can use any method to find the smallest and biggest number.

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