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Two halves equal: One whole. Minus one quarter from the 'one whole', equals: Three fourths If you think of it in u.s. money, two halves .50 cent pieces, equals a total of one whole dollar. If you take a quarter, 1/4 away, you have 3 quarters left. Since 4 quarters make up a whole dollar, by taking away one of the quarters, you are left with 3 quarters. In fraction terms, your left with: 3/4 Hope that answers your question :o)
There are four halves in two wholes. Each whole is made up of two halves, so when you multiply two wholes by two halves per whole, you get four halves in total.
You multiply two halves, the equivalent of four, by four to get a product of 8 halves. Then add the "extra" half from the original "four and one half" to get nine halves.
Cut it in two halves. Stack the two halves, one on top of the other, and cut the pile in half. Stack the four quarters, one on top of the other, and cut the pile in half. Three cuts, eight slices.
Any symmetrical figure has two halves that match. By definition, you cannot have more than two halves of a figure.