Sum of 11.1 and 8.9 equals to?

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Solution

Let's add 11.1 and 8.9:

Step 1: 11.1 has 1 digit after the decimal point and 8.9 has 1 digit after the decimal points. So they are already having the equal number of digits after the decimal point.

Step 2: Align the decimal numbers according to their place values one below the other, allign the tenths digits 1 and 9 and allign the ones digits 1 and 8.
$T O . t$
$11.1 + 8.9 - - - -$

Step 3: Add each column of digits, starting on the right. If the sum of a column is more than 10, carry digits to the next column on the left
Finally, place the decimal point of the sum vertically below the other decimal points.

$∴ Sum of 11.1 and 8.9 is 20.0 .$

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