Year 4 maths · B.1 · Find the Unknown
Find the missing number: addition to 100
Every number is 100 or less.
See worked examples
□ + 83 = 89 What number goes in the box?
Answer: 6
84 + □ = 97 What number goes in the box?
Answer: 13
80 + □ = 86 What number goes in the box?
Answer: 6
Tip: Every number is 100 or less.
On paper: this skill is in the printable pack Grade 3 Common Core Math: Patterns and Algebraic Thinking, with an answer key.
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