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Observe the following group of data, according to a certain rule, the appropriate number on the horizontal line: - 5, - 2,1,4, () 10
It's speechless. Ha, add 3 in turn, that's 7
Three fifths of a number is 15. What's six fifths of a number?
There is another question: the sum of a number and 1 / 5 is equivalent to 3 / 5 of 4 / 9!
1. 15 △ 3 / 5 = 25 25 × 6 / 5 = 30, so 6 / 5 of this number is 30 2, 4 / 9 × 3 / 5-1 / 5 = 4 / 15-3 / 15 = 1 / 15, so this number is 1 / 15
One fifth of a number is 14 less than two-thirds of it. What's the number?
14÷（2/3-1/5）=14÷7/15=30
A: the number is 30
RELATED INFORMATIONS
- 1. A number less than 2 / 2 of a number is 3 / 5. Find this number
- 2. 25 of a number is exactly 23 of 50. This number is______ ．
- 3. One third of a number is 30 less than 50% of 120. Find the number
- 4. Two thirds of a number is four times more than two thirds of thirty
- 5. There are 46 students in class 6 (1) of hope primary school. Class 6 (2) has two more students than one third of the whole grade. The total number of these two classes accounts for 5 / 7 of the whole grade,
- 6. -What is the sum of - 1 / 2 and 1 / 6? 1 + (- 2) + 3 + (- 4) + 5 + (- 6) +. + 99 + (- 100)= -1 / 60 ÷ (1 / 3 + 1 / 4-1 / 5) = (0.123) to the 5th power * the 4th power of 8=
- 7. How much more is the difference between 7 and 7 / 10 than 4 / 5
- 8. How to calculate 1 - (one sixth - one seventh) + one sixth
- 9. One half, six seventh, two-thirds of these three numbers to compare again, please
- 10. Quarter and three eighths
- 11. Carefully observe the law of numbers, what is the most suitable to fill in the horizontal line 1, 8, 9, 4, 1 / 6 A.3 B.2 C.1 D.1 / 6 The second question is a sharp turn of the brain What is made on the same day as the expiration date
- 12. 8 minus 9 out of 10 is more than 4 out of 5,
- 13. The ratio of the two ratios that make up the proportion is two fifths, and the two external terms are one half and one fourth. This ratio is () or ()
- 14. The ratio of two fifths to twelve is (); the simplest integer ratio equal to this ratio is (); the ratio of two ratios is ()
- 15. Two fifths of a number minus 4.2 and its tenth to find the number
- 16. 60% of a number is 10% less than 2 / 5 of 10
- 17. A number is 2 less than 25 of 60. What's the number?
- 18. 1. Arrange 3 / 10, 2 / 7, 5 / 8 from large to small. 2, 4 and 2 / 5, 4 and 5 / 8, 4.5 from large to small
- 19. Three quarters of a number is 35 more than two fifths of it. Find the number
- 20. Given that two fifths of a number is three fourths, how much is the number? The formula is ()