Facts Masters • Pre-Algebra Bridge

Missing Number Addition

Find the number that makes the addition sentence true. This is the bridge from math facts to algebra.

Score 0
Streak 0
Best Streak 0
Time Left 60
Choose the missing number. The blank may appear before or after the equals sign.
+10 for each correct answer. Bonus +5 every 3 in a row.
Complete the Addition Sentence
8 + = 15
Level One setup: 6 choices, one correct missing addend, 60-second round. The equation position and numbers rotate each round.