diff --git a/mute-interpreter/src/env/core.rs b/mute-interpreter/src/env/core.rs
index f17f1ca..f0a0d66 100644
--- a/mute-interpreter/src/env/core.rs
+++ b/mute-interpreter/src/env/core.rs
@@ -279,8 +279,15 @@ pub(super) fn core() -> HashMap<String, Node> {
             Node::NativeFunc(|_env, args| {
                 arg_count!(2, args.len());
 
-                let less_than = match (args[0].borrow(), args[1].borrow()) {
+                let mut args = args.into_iter();
+                let lhs = args.next().unwrap();
+                let rhs = args.next().unwrap();
+
+                let less_than = match (lhs, rhs) {
                     (Node::Int(lhs), Node::Int(rhs)) => lhs < rhs,
+                    (Node::Float(lhs), Node::Float(rhs)) => lhs < rhs,
+                    (Node::Float(lhs), Node::Int(rhs)) => lhs < rhs as f64,
+                    (Node::Int(lhs), Node::Float(rhs)) => (lhs as f64) < rhs,
                     _ => Err(Error::ExpectedNumber)?,
                 };
 
@@ -292,8 +299,15 @@ pub(super) fn core() -> HashMap<String, Node> {
             Node::NativeFunc(|_env, args| {
                 arg_count!(2, args.len());
 
-                let greater_than = match (args[0].borrow(), args[1].borrow()) {
+                let mut args = args.into_iter();
+                let lhs = args.next().unwrap();
+                let rhs = args.next().unwrap();
+
+                let greater_than = match (lhs, rhs) {
                     (Node::Int(lhs), Node::Int(rhs)) => lhs > rhs,
+                    (Node::Float(lhs), Node::Float(rhs)) => lhs > rhs,
+                    (Node::Float(lhs), Node::Int(rhs)) => lhs > rhs as f64,
+                    (Node::Int(lhs), Node::Float(rhs)) => (lhs as f64) > rhs,
                     _ => Err(Error::ExpectedNumber)?,
                 };
 
@@ -305,8 +319,15 @@ pub(super) fn core() -> HashMap<String, Node> {
             Node::NativeFunc(|_env, args| {
                 arg_count!(2, args.len());
 
-                let less_than_equal = match (args[0].borrow(), args[1].borrow()) {
+                let mut args = args.into_iter();
+                let lhs = args.next().unwrap();
+                let rhs = args.next().unwrap();
+
+                let less_than_equal = match (lhs, rhs) {
                     (Node::Int(lhs), Node::Int(rhs)) => lhs <= rhs,
+                    (Node::Float(lhs), Node::Float(rhs)) => lhs <= rhs,
+                    (Node::Float(lhs), Node::Int(rhs)) => lhs <= rhs as f64,
+                    (Node::Int(lhs), Node::Float(rhs)) => (lhs as f64) <= rhs,
                     _ => Err(Error::ExpectedNumber)?,
                 };
 
@@ -318,8 +339,15 @@ pub(super) fn core() -> HashMap<String, Node> {
             Node::NativeFunc(|_env, args| {
                 arg_count!(2, args.len());
 
-                let greater_than_equal = match (args[0].borrow(), args[1].borrow()) {
+                let mut args = args.into_iter();
+                let lhs = args.next().unwrap();
+                let rhs = args.next().unwrap();
+
+                let greater_than_equal = match (lhs, rhs) {
                     (Node::Int(lhs), Node::Int(rhs)) => lhs >= rhs,
+                    (Node::Float(lhs), Node::Float(rhs)) => lhs >= rhs,
+                    (Node::Float(lhs), Node::Int(rhs)) => lhs >= rhs as f64,
+                    (Node::Int(lhs), Node::Float(rhs)) => (lhs as f64) >= rhs,
                     _ => Err(Error::ExpectedNumber)?,
                 };