Section 1

Squaring numbers that end with 5

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Squaring means multiplying a number by itself.

Let us try 25²

which means 25 x 25

The number other than 5 in 25 is 2

The number after 2 is 3

2 x 3 = 6


We know that 5 x 5 = 25

The answer:

25² = 625   (Here I will show arrows to the earlier calculations)

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Let us try 45²

which means 45 x 45

The number other than 5 in 45 is 4

The number after 4 is 5

4 x 5 = 20



We know that 5 x 5 = 25

The answer:

45² = 2025   (Here I will show arrows to the earlier calculations)

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Let us try 115²

which means 115 x 115

The number other than 5 in 115 is 11

The number after 11 is 12

11 x 12 = 132



We know that 5 x 5 = 25

The answer:

45² = 13225   (Here I will show arrows to the earlier calculations)

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