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The surface area of the earth is more than () kilometers? The surface area of the earth is more than () billion square kilometers? The land of human life accounts for about () of the surface area?
The surface area of the earth is more than (510) million square kilometers, and the land where human beings live accounts for about (29%) of the surface area
Fractional division
One fifth of a number is two-thirds more than one sixth of it. How much less is one fifth of a number than one fourth of it?
Two thirds divided by (one fifth minus one sixth) is 20
20 times a quarter minus 20 times a fifth is one
I'm confused. I feel like everyone's coming
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