Long ago the ancient Greeks Romans and probably Egyptians used a tool called the abacus – and yes it does sound like an Egyptian god. The abacus is a box that has sticks in it and has beads that you slide up and down on the sticks. Blaise Pascal’s father was rich in the government but he all of it in bonds that the government didn’t pay back. A long time later Blaise’s father became a tax collector and had to do a ton of addition and subtraction and couldn’t risk miscalculating. Blaise Pascal made the mechanical calculator so his dad could be faster and more accurate. That calculator lasted until 1970 then it was replaced by digital calculators that keep getting better and better.
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