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What is zero sense?
The ability to be at home with large numbers like millions, billions, trillions, and quadrillions, and not just knowing how many zeros they each have.
Being aware that a million has 6 zeros, a billion has 9 zeros, a trillion has 12 zeros, and a quadrillion has 15 zeros is only the first step; we need to try visualizing the difference between them by putting them into context—we need that zero sense to get a feel of what these numbers represent.