diff --git a/NEWS.md b/NEWS.md
index 444aecd4b..25847eaa9 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Added
+- Implemented addition/subtraction between a `TensorValue` and a `SymTensorValue`. Since PR [#755](https://github.com/gridap/Gridap.jl/pull/755).
+
 ### Fixed
 - Restrict to the active model the evaluation of a FE function at arbitrary points. Since PR [#752](https://github.com/gridap/Gridap.jl/pull/752).
 
diff --git a/src/TensorValues/Operations.jl b/src/TensorValues/Operations.jl
index ac824b79e..db092fe9b 100644
--- a/src/TensorValues/Operations.jl
+++ b/src/TensorValues/Operations.jl
@@ -53,11 +53,11 @@ for op in (:+,:-)
     end
 
     function ($op)(a::TensorValue,b::SymTensorValue)
-      @notimplemented
+      map(($op), a, TensorValue(get_array(b)))
     end
 
     function ($op)(a::SymTensorValue,b::TensorValue)
-      @notimplemented
+      map(($op), TensorValue(get_array(a)), b)
     end
 
   end
diff --git a/test/TensorValuesTests/OperationsTests.jl b/test/TensorValuesTests/OperationsTests.jl
index d2475e739..5e4892132 100644
--- a/test/TensorValuesTests/OperationsTests.jl
+++ b/test/TensorValuesTests/OperationsTests.jl
@@ -104,6 +104,20 @@ c = a + b
 r = SymTensorValue(6,8,10)
 @test c==r
 
+a = TensorValue(1,2,3,4)
+b = SymTensorValue(5,6,7)
+
+c = a + b
+r = TensorValue(6,8,9,11)
+@test c==r
+
+a = SymTensorValue(5,6,7)
+b = TensorValue(1,2,3,4)
+
+c = a - b
+r = TensorValue(4,4,3,3)
+@test c==r
+
 # Matrix Division
 
 a = VectorValue(1,2,3)