(2) A five-meter-long rope was cut off by one fifth, leaving (4.8) meters.
(3) A five-meter-long rope was cut by one fifth, leaving (4) meters.
(4) The smallest three-digit number that can be divisible by both 2 and 3 is (102).
(5) The smallest three-digit ten that can be divisible by 3 and 5 at the same time (105)
(6) The sum of all the simplest true fractions with a denominator of 8 is (2) The sum of all the true fractions with a denominator of 8 is (3.5).
(7) The largest four-digit number that can be divided by four different numbers at the same time by 2, 3 and 5 is (9870).
(8) Cut a color cube into eight cubes, paint (8) cubes on three sides, cut a color cube into 27 cubes, paint (8) cubes on three sides, paint (12) cubes on two sides, and paint (6) cubes on one side.
(9) The numerator of a fraction is enlarged by 3 times, the denominator is reduced by 2 times, and the fractional value (becomes 6 times the original value).
The numerator of a fraction is reduced by 3 times, the denominator is enlarged by 2 times, and the fractional value (becomes the original 1/6).
The numerator of a fraction is magnified 3 times, the denominator is magnified 3 times, and the fractional value (unchanged).