16. Divide 3 tons of coal into 8 parts on average, with the mass fraction of each part being (3/8) tons, the decimal part being (0.375) tons and the integer part being (375) kilograms.
17. Divide 2kg of fruit into 5 portions, with each portion being 2kg (1/5) and each portion being 1 kg (2/5).
18 The denominator of 9 is the maximum true score (8/9), the minimum false score (9/9) and the minimum band score (1 and 1/9).
19. Put 10g salt into 100g water, and the salt accounts for (11) of the brine.
20. Fold the 3-meter-long rope twice, with each section being (0.75) meters.
2 1, reduce the denominator of 12/ 18 to the original 1/6, and subtract the numerator (10) to keep the fraction size unchanged.
22. Enlarge two-thirds of the numerator by five times, and the denominator should also be enlarged by five times to keep the size of the fraction unchanged.
The molecular fraction of 23.2/5 increased by 12. To keep the score unchanged, the denominator should be (enlarged by 7 times).
24. The simplest true fraction that the product of numerator and denominator is 30 may be (5/6,3/10).
Compared with 25, 3/4 and 7/8, (7/8) has a larger score and (3/4) has a larger score unit.
26, numerator plus 3 to 3/8, denominator plus (8), the fraction size remains unchanged.
27. Among the simplest true scores of molecule 12, the largest is (12/13); Among the simplest true fractions whose denominator is 12, the largest is (112); The sum of the simplest true fractions whose denominator is 12 is (2).
28. Saw the 4-meter-long wood into 4 sections, each section is (1/4) of the wood, and each section is (1) meters long.
29. A fraction plus its fractional unit is equal to 1, and a fractional unit minus it is equal to 5/6. The score is (1112).
30. In 6/X, when x (greater than 6), it is a true fraction; When x (equal to or less than 6), it is a false score; When x (0), it has no meaning; When X( 1, 2, 3, 6), it can be converted into an integer.
3 1, the difference between numerator and denominator of a fraction is 66, which can be changed to 13/7, and the original fraction is (143/77).
32. The simplest true score, the sum of numerator and denominator is 15, and there are (4) such scores.
33. Fold a rectangular piece of paper four times, one of which belongs to this piece of paper (1/8).
34. Line up five playing cards backwards (from left to right). Switch the positions of the 1 card and the third card first, and then switch the positions of the second card and the fifth card. Finally, move the fourth card to the first card on the left and open it. From left to right, it is 8, 5, 3, 9, 10. The original order of these five cards from left to right is (9, 10, 5, 8, 3).
35. Cut the largest triangle into a semicircle with a diameter of 16 cm, and the area of the remaining part is (14.25) cm 2?
Have you thought of the last question?
Hope to adopt