1diff --git a/README.md b/README.md
 2index bf226fc..d3d9d9e 100644
 3--- a/README.md
 4+++ b/README.md
 5@@ -69,7 +69,19 @@ TypeConverter.
 6 ### Ensure all formulas are tested inside of SheetFormulaTest.ts
 7 
 8 
 9-### Test all functions in src/Utilities
10+### Test ArgsChecker
11+
12+
13+### Test CriteriaFunctionFactory
14+
15+
16+### Test Filter
17+
18+
19+### Test Serilaizer
20+
21+
22+### Test TypeConverter
23 
24 
25 ### CONVERT could offer more accurate conversions for units in the same system
26diff --git a/src/Sheet.ts b/src/Sheet.ts
27index f83020c..01df1e7 100644
28--- a/src/Sheet.ts
29+++ b/src/Sheet.ts
30@@ -398,14 +398,9 @@ var Sheet = (function () {
31     mathMatch: function (type, number1, number2) {
32       var result;
33 
34-      // TODO: These should convert
35       number1 = helper.number(number1);
36       number2 = helper.number(number2);
37 
38-      if (isNaN(number1) || isNaN(number2)) {
39-        throw Error('VALUE'); // TODO: we should catch and handle this when we convert the numbers...
40-      }
41-
42       switch (type) {
43         case '+':
44           result = number1 + number2;
45diff --git a/tests/SheetFormulaTest.ts b/tests/SheetFormulaTest.ts
46index 38f5f74..26dbb19 100644
47--- a/tests/SheetFormulaTest.ts
48+++ b/tests/SheetFormulaTest.ts
49@@ -5,7 +5,7 @@ import {
50   assertEquals,
51   test
52 } from "./utils/Asserts";
53-import {DIV_ZERO_ERROR} from "../src/Errors";
54+import {DIV_ZERO_ERROR, VALUE_ERROR} from "../src/Errors";
55 
56 function assertFormulaEqualsError(formula: string, errorString: string) {
57   var sheet  = new Sheet();
58@@ -451,4 +451,13 @@ test("Sheet ^", function(){
59   assertFormulaEquals('= 10 ^ 0', 1);
60   assertFormulaEquals('= 1 ^ 1', 1);
61   assertFormulaEquals('= 2 ^ 10', 1024);
62+});
63+
64+test("Sheet mathMathc", function(){
65+  assertFormulaEquals('= "10" + 10', 20);
66+  // TODO: throws parse error, should clean up
67+  // assertFormulaEqualsError('= 10e / 1', VALUE_ERROR);
68+  // TODO: Should fail, but doesn't because 10e parses to a string
69+  // assertFormulaEqualsError('= "10e" + 10', VALUE_ERROR);
70+  assertFormulaEqualsError('= "MR" + 10', VALUE_ERROR);
71 });
72\ No newline at end of file