**Math: Multiplication fun fact**

August 12, 2019

Perfect Squares of two digit numbers that end with 5

Step 1 - multiply the first digit by the next consecutive integer

Step 2 - place 25 at the end of your result

Lets try an example

15 x15 = ?

Step 1 - the first digit is 1

the next consecutive integer after 1 is 2

1 x 2 = 2

Step 2 - place 25 at the end of 2

this is 225

15 x 15 = 225

Next example

25 x 25= ?

step 1 - 2X3 = 6

step 2 - 625

25 x 25 = 625

Final example

35 x 35=?

step 1 - 3 x 4 = 12

step 2 - 1225

35 x 45 = 1225

Practice these on your own, and verify with the use of a calculator

45 x 45 =

55 x 55 =

65 x 65 =

75 x 75 =

85 x 85 =

95 x 95 =