diff --git a/coding_interviews/algoexpert/evaluate-expression-tree/evaluate-expression-tree-with-trunc.js b/coding_interviews/algoexpert/evaluate-expression-tree/evaluate-expression-tree-with-trunc.js
new file mode 100644
index 0000000..440d943
--- /dev/null
+++ b/coding_interviews/algoexpert/evaluate-expression-tree/evaluate-expression-tree-with-trunc.js
@@ -0,0 +1,13 @@
+function evaluateExpressionTree(tree) {
+  if (!tree) return null;
+
+  let leftValue = evaluateExpressionTree(tree.left);
+  let rightValue = evaluateExpressionTree(tree.right);
+
+  if (!leftValue && !rightValue) return tree.value;
+
+  if (tree.value === -1) return leftValue + rightValue;
+  if (tree.value === -2) return leftValue - rightValue;
+  if (tree.value === -3) return Math.trunc(leftValue / rightValue);
+  if (tree.value === -4) return leftValue * rightValue;
+}