because the people thought it was easier to trade other than trade all there other
belongings that they had.
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It made it easier for long distance trading because China got a lot of it's stuff from other places.
Trading off means to change one number of your sum by adding to make it easier to answer and then you subtrack it in your final answer or second. For Example: 1.95 ------> + 0.05 = 2.00 + 2.37 -----------------> 2.37 --------- --------- 4.37 ------> - 0.05 = 4.32 = Answer
What four ways can you make a1.00 out of 12 coins
50 two cent coins, they exist.
Because coins are more portable than gold bars. (by Solomon Zelman)
No, you can't make 25 cents out of 22 coins