diff --git a/src/bignum.nr b/src/bignum.nr
index b50a02b2..52002bd7 100644
--- a/src/bignum.nr
+++ b/src/bignum.nr
@@ -212,18 +212,17 @@ where
     unconstrained fn __batch_invert<let M: u32>(x: [Self; M]) -> [Self; M] {
         let params = Params::get_params();
         assert(params.has_multiplicative_inverse);
-        __batch_invert::<_, MOD_BITS, _>(params, x.map(|bn| Self::get_limbs_slice(bn).as_array()))
-            .map(|limbs| Self { limbs })
+        __batch_invert::<_, MOD_BITS, _>(params, x.map(|bn: Self| bn.limbs)).map(|limbs| {
+            Self { limbs }
+        })
     }
 
     unconstrained fn __batch_invert_slice<let M: u32>(x: [Self]) -> [Self] {
         let params = Params::get_params();
         assert(params.has_multiplicative_inverse);
-        __batch_invert_slice::<_, MOD_BITS>(
-            params,
-            x.map(|bn| Self::get_limbs_slice(bn).as_array()),
-        )
-            .map(|limbs| Self { limbs })
+        __batch_invert_slice::<_, MOD_BITS>(params, x.map(|bn: Self| bn.limbs)).map(|limbs| {
+            Self { limbs }
+        })
     }
 
     unconstrained fn __tonelli_shanks_sqrt(self) -> std::option::Option<Self> {
@@ -243,17 +242,11 @@ where
         let params = Params::get_params();
         let (q_limbs, r_limbs) = __compute_quadratic_expression::<_, MOD_BITS, _, _, _, _>(
             params,
-            map(
-                lhs_terms,
-                |bns| map(bns, |bn| Self::get_limbs_slice(bn).as_array()),
-            ),
+            map(lhs_terms, |bns| map(bns, |bn: Self| bn.limbs)),
             lhs_flags,
-            map(
-                rhs_terms,
-                |bns| map(bns, |bn| Self::get_limbs_slice(bn).as_array()),
-            ),
+            map(rhs_terms, |bns| map(bns, |bn: Self| bn.limbs)),
             rhs_flags,
-            map(linear_terms, |bn| Self::get_limbs_slice(bn).as_array()),
+            map(linear_terms, |bn: Self| bn.limbs),
             linear_flags,
         );
         (Self { limbs: q_limbs }, Self { limbs: r_limbs })
@@ -270,17 +263,11 @@ where
         let params = Params::get_params();
         evaluate_quadratic_expression::<_, MOD_BITS, _, _, _, _>(
             params,
-            map(
-                lhs_terms,
-                |bns| map(bns, |bn| Self::get_limbs_slice(bn).as_array()),
-            ),
+            map(lhs_terms, |bns| map(bns, |bn: Self| bn.limbs)),
             lhs_flags,
-            map(
-                rhs_terms,
-                |bns| map(bns, |bn| Self::get_limbs_slice(bn).as_array()),
-            ),
+            map(rhs_terms, |bns| map(bns, |bn: Self| bn.limbs)),
             rhs_flags,
-            map(linear_terms, |bn| Self::get_limbs_slice(bn).as_array()),
+            map(linear_terms, |bn: Self| bn.limbs),
             linear_flags,
         )
     }