Speed Math

CHAPTER10

Squared Numbers

In This Chapter

• Finding the value of a squared number that ends in 5
• Learning how to find the square of a number near 50
• Using the duplex to find the value of two-, three-, and four-digit numbers
• Figuring the sums of squares

Squared numbers are only too easy to type into a calculator, but if you need to do them in your head, it can be a bit tricky. However, there are ways you can find the values that allow you to go beyond the calculator and really understand squared numbers.

In this chapter, you learn processes for finding the value of squares and for adding squared numbers.

Finding Squares of Numbers Ending in 5 ...