Squaring Numbers Ending in Five

This video tutorial from Moo Moo Math and Science demonstrates a quick trick for squaring numbers that end in five. The method involves multiplying the first digit of the number by itself plus one, and then adding 25 to the result. The video provides a clear explanation of the trick and includes two examples: squaring 35 and 45. This technique simplifies the process and speeds up calculations.

What is the first step in the trick for squaring numbers ending in five?

• Multiply the first digit by the next higher number

• Multiply the first digit by itself

• Add 25 to the number

• Subtract 5 from the number

When using the trick, what do you add to the product of the first digit and the next higher number?

• 15

• 25

• 35

• 45

In the example of squaring 35, what is the product of the first digit and the next higher number?

• 6

• 9

• 15

• 12

What is the result of squaring 35 using the trick?

• 1325

• 1225

• 1525

• 1425

In the example of squaring 45, what is the final result?

• 2025

• 2125

• 2225

• 2325