Missing Addend Calculator

Enter the sum and one addend to find the missing addend.

Find the missing addend by sum and addend

Result

How to Calculate the Missing Addend?

In addition, if you know the total sum and one of the addends, you can find the missing addend by subtraction. This process is simple: just subtract the known addend from the total sum, and the result will be the missing addend.

Formula:

Missing Addend = Sum - Known Addend

Example 1

The sum is \( 150 \), and one addend is \( 57.5 \). What is the other addend?

Solution:

Subtract the known addend from the total sum:

\( 150 - 57.5 = 92.5 \)

Result: The missing addend is \( 92.5 \).

Example 2

The sum is \( 200 \), and one addend is \( 75 \). What is the other addend?

Solution:

Subtract the known addend from the total sum:

\( 200 - 75 = 125 \)

Result: The missing addend is \( 125 \).

Example 3

One addend is \( 12.3 \), and the sum is \( 35.8 \). What is the other addend?

Solution:

Subtract the known addend from the total sum:

\( 35.8 - 12.3 = 23.5 \)

Result: The missing addend is \( 23.5 \).