Find Missing Addend (Sum to 20)
1st Grade Math practice: 11 + ? = 18. Part of addition strategies: within 20 (Addition Strategies: Within 20).
~9 min
In 8 + ? = 15, what is the missing number?
1st Grade Math practice: 11 + ? = 18. Part of addition strategies: within 20 (Addition Strategies: Within 20).
In 8 + ? = 15, what is the missing number?