diff --git a/sprout/range/numeric/non_modifying.hpp b/sprout/range/numeric/non_modifying.hpp
index e3f632e4..0d86c0b7 100644
--- a/sprout/range/numeric/non_modifying.hpp
+++ b/sprout/range/numeric/non_modifying.hpp
@@ -4,5 +4,7 @@
 #include <sprout/config.hpp>
 #include <sprout/range/numeric/accumulate.hpp>
 #include <sprout/range/numeric/inner_product.hpp>
+#include <sprout/range/numeric/unstable_accumulate.hpp>
+#include <sprout/range/numeric/unstable_inner_product.hpp>
 
 #endif	// #ifndef SPROUT_RANGE_NUMERIC_NON_MODIFYIING_HPP
diff --git a/sprout/range/numeric/unstable_accumulate.hpp b/sprout/range/numeric/unstable_accumulate.hpp
new file mode 100644
index 00000000..98fd2d0e
--- /dev/null
+++ b/sprout/range/numeric/unstable_accumulate.hpp
@@ -0,0 +1,26 @@
+#ifndef SPROUT_RANGE_NUMERIC_UNSTABLE_ACCUMLATE_HPP
+#define SPROUT_RANGE_NUMERIC_UNSTABLE_ACCUMLATE_HPP
+
+#include <sprout/config.hpp>
+#include <sprout/numeric/unstable_accumulate.hpp>
+
+namespace sprout {
+	namespace range {
+		//
+		// unstable_accumulate
+		//
+		template<typename Range, typename T, typename BinaryOperation>
+		inline SPROUT_CONSTEXPR T
+		unstable_accumulate(Range const& range, T init, BinaryOperation binary_op) {
+			return sprout::unstable_accumulate(sprout::begin(range), sprout::end(range), init, binary_op);
+		}
+
+		template<typename Range, typename T>
+		inline SPROUT_CONSTEXPR T
+		unstable_accumulate(Range const& range, T init) {
+			return sprout::unstable_accumulate(sprout::begin(range), sprout::end(range), init);
+		}
+	}	// namespace range
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_RANGE_NUMERIC_UNSTABLE_ACCUMLATE_HPP
diff --git a/sprout/range/numeric/unstable_inner_product.hpp b/sprout/range/numeric/unstable_inner_product.hpp
new file mode 100644
index 00000000..01ba669d
--- /dev/null
+++ b/sprout/range/numeric/unstable_inner_product.hpp
@@ -0,0 +1,30 @@
+#ifndef SPROUT_RANGE_NUMERIC_UNSTABLE_INNER_PRODUCT_HPP
+#define SPROUT_RANGE_NUMERIC_UNSTABLE_INNER_PRODUCT_HPP
+
+#include <sprout/config.hpp>
+#include <sprout/numeric/unstable_inner_product.hpp>
+
+namespace sprout {
+	namespace range {
+		//
+		// unstable_inner_product
+		//
+		template<typename Range1, typename Range2, typename T, typename BinaryOperation1, typename BinaryOperation2>
+		inline SPROUT_CONSTEXPR T
+		unstable_inner_product(
+			Range1 const& range1, Range2 const& range2, T init,
+			BinaryOperation1 binary_op1, BinaryOperation2 binary_op2
+			)
+		{
+			return sprout::unstable_inner_product(sprout::begin(range1), sprout::end(range1), sprout::begin(range2), init, binary_op1, binary_op2);
+		}
+
+		template<typename Range1, typename Range2, typename T>
+		inline SPROUT_CONSTEXPR T
+		unstable_inner_product(Range1 const& range1, Range2 const& range2, T init) {
+			return sprout::unstable_inner_product(sprout::begin(range1), sprout::end(range1), sprout::begin(range2), init);
+		}
+	}	// namespace range
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_RANGE_NUMERIC_UNSTABLE_INNER_PRODUCT_HPP