diff --git a/solidity/saving_gas.md b/solidity/saving_gas.md
index 96bcd6c..8c682d9 100644
--- a/solidity/saving_gas.md
+++ b/solidity/saving_gas.md
@@ -4,6 +4,8 @@
 <br>
 
 #### Gas is the cost to for on-chain computation and storage.
+#### Examples: addition costs 3 gas, Keccak-256 costs 30 gas + 6 gas for each 256 bits of data being hashed, sending a transaction costs 21,000 gas.
+
 
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