How many times of 27 is 35? How many times of 35 is 21? This is our fifth grade paper. The answer can be scores or numbers,

35 is thirty-five times twenty-seven times twenty-seven
21 is three fifths of 35

These ten numbers: 19, 27, 31, 11, 21, 31, 12, 21, 18, 36 use addition, subtraction, multiplication and division, finally equal to 19, also can appear decimal point

19+27×31×11×21×31×[12×（21-18）-36]

2 / 12 * 14 + 2 / 14 * 16 + 2 / 16 * 18 + 2 / 18 * 20 + 1 / 20

Original formula = 1 / 12 - 1 / 14 + 1 / 14 - 1 / 16 + 1 / 16 - 1 / 18 + 1 / 18 - 1 / 20 + 1 / 20
= 1/12

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