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The Arabs' 4 still had the early concept of the cross, but for the sake of efficiency, was made in one stroke by connecting the "western" end to the "northern" end; the "eastern" end was finished off with a curve. The Europeans dropped the finishing curve and gradually made the digit less cursive, ending up with a digit very close to the original Brahmin cross. The area of the compound shape may be found by splitting the shape into two rectangles such as A and B or C and D, as shown in the image, and adding the two separate areas. While the shape of the character for the digit 4 has an ascender in most modern typefaces, in typefaces with text figures the glyph usually has a descender, as, for example, in .
The area of the shape may also be found by subtracting the area of rectangle F from the area of rectangle E. The calculation may use a subtraction of areas where a rectangle has been removed from a larger rectangle. There is also a hint that the word is too short, which means that you entered fewer letters than there are in the line. Use exactly four 4's to form every integer from 0 to 50, using only the operators +, −, ×, /, () (brackets), .The choice of method may depend on whether additional lengths must be worked out before the area can be calculated.
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Watch this video to remind yourself about how to use column addition to add up numbers with 3 digits.Height 50%
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