Use fact patterns to complete each equation.
14 + 4 = 18
13 +..... = 18

The correct answer is: 5

>>>We have given the addition of the augend 14 and the addend 4 gives sum equals to 18.
>>>We were asked to find the addend when the augend 13 is added to give sum equals to 18.
>>>Therefore, we can observe that in both cases the sum remains same and augend is decreased by 1 unit. Then, the addend should be increased by 1 unit.
>>>Hence, the addend becomes 5.
>>>Therefore, the Addition is 13 + 5 = 18.

14 + 4 = 18
13 + 5 = 18