diff --git a/src/function/arithmetic/abs.js b/src/function/arithmetic/abs.js
index e7a0b6d90..866db2ab7 100644
--- a/src/function/arithmetic/abs.js
+++ b/src/function/arithmetic/abs.js
@@ -1,5 +1,5 @@
 /**
- * Calculate the square root of a value
+ * Calculate the absolute value of a value
  * @param {Number | Complex | Array | Matrix | Range} x
  * @return {Number | Complex | Array | Matrix} res
  */
diff --git a/src/function/arithmetic/multiply.js b/src/function/arithmetic/multiply.js
index 448a0ff77..fd4acb8e8 100644
--- a/src/function/arithmetic/multiply.js
+++ b/src/function/arithmetic/multiply.js
@@ -1,5 +1,5 @@
 /**
- * Multiply two values. x + y or multiply(x, y)
+ * Multiply two values. x * y or multiply(x, y)
  * @param  {Number | Complex | Unit | Array | Matrix | Range} x
  * @param  {Number | Complex | Unit | Array | Matrix | Range} y
  * @return {Number | Complex | Unit | Array | Matrix} res