Add together 1.728, 0.9975, and 2.42. What is the sum?

To find the sum of 1.728, 0.9975, and 2.42, it’s essential to align the numbers correctly by their decimal points. The proper addition process involves ensuring that all the numbers have the same number of decimal places.

First, it’s helpful to rewrite the numbers with sufficient decimal places:

• 1.728 can be written as 1.7280 (adding an extra zero for alignment).

• 0.9975 is already at four decimal places.

• 2.42 can be written as 2.4200 (adding two zeros for alignment).

Now, aligning them for addition gives:

1.7280

0.9975

+ 2.4200

---------

Adding starting from the rightmost digit, we add column by column:

• The rightmost column: 0 + 5 + 0 = 5

• The next column: 8 + 7 + 0 = 15 (write down 5 and carry over 1)

• The next column: 2 + 9 + 2 + 1 (the carry) = 14 (write down 4 and carry over 1