Problem 1 · 2013 Math Kangaroo
Easy
Arithmetic & Operations
grouping
Which answer completes the addition tree? In each box you add the two numbers that feed into it.
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Answer: E — 6
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Hint 1 of 2
Each box holds the sum of the two numbers that point into it from above.
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Hint 2 of 2
Fill the middle boxes first, then add those two results for the bottom box.
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Approach: add up the tree level by level
- The four numbers on top are 2, 0, 1 and 3.
- Add each side: the left pair gives \(2 + 0 = 2\) and the right pair gives \(1 + 3 = 4\).
- The bottom box adds those two: \(2 + 4 = 6\), which is choice E.
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