1. The boiler room needs to purchase 10 and 1/4 tons of coal. If it is transported by trucks of 2 and 1/4 tons, it must be transported at least (5 times).

2. Cut the 8/9-meter-long conductor into four sections on average, and the formula for finding 2/9 meters in each section is (8/9÷4=2/9).

3. If A divided by B equals 5 divided by 6, then B is (5/6) of A and A is (6/5) of B. ..

4. 6/7 of (7/9) is 3/5 kilometers. 3/4 kg is 9/ 10 kg (5/6).

5.2 1/6 hours =( 130) minutes; 4 3/5 hours = (276) minutes.

6.24 equals 4/5 of the counted number, and the counted number is (30).

7. Xiaohua walks 3 kilometers in 3/4 hours. According to this calculation, it takes 1 km to walk 1/4 hours. The formula is (3/4 ÷ 3 = 1/4).

8. The car travels 40 kilometers in 2/3 hours, the car travels (60) kilometers per hour, and the car travels 1 km, with an average time (1/60).

9. If 8/9 of a number is 0/7 of 65438+56, then this number is (9).

10. If you read a science and technology book of16 every day, (3) you can read half of the books in one day.

1 1. Fill in "greater than or less than or equal to" in the brackets.

14/ 15 divided by 7/30 (>; ) 14/ 15 1/9 divided by 3 (