Practice!

Sample Problem

What fact is missing from this fact family? Type the sentence in the blank.

431 - 154 = 277

431 - 277 = 154

154 + 277 = 431

 

Solution

In addition, the result must be the largest number 431 and the addend can be 154 or 277.

In subtraction, the minuend must be the largest number 431 and the subtrahend can be 154 or 277.

Thus, the missing sentence is: 277 + 154 = 431