How to calculate 1 - (one sixth - one seventh) + one sixth

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• 1. One half, six seventh, two-thirds of these three numbers to compare again, please
• 2. Quarter and three eighths
• 3. 1/2*1+1/2*3+1/3*4+.+1/2004*2005=?
• 4. 1. (- two fifths) - (- three fifths) 2. One half one third 3 4. - two thirds - (- one sixth) 5.0 - (- three fourths) 6. (- 2) - (+ two thirds) 7. (- 16 and 3 / 4) - (- 10 and 1 / 4) - (+ 1 / 2) 8. - 4.2 + 5.7 - 8.4 + 10.9. - one quarter + five sixths + two thirds - one half
• 5. You mathematical experts help! Half, one third, two fifths, three eighths, five thirteenth, eight twenty-one fill out the last two
• 6. It is proved by limit that if the limit of XN is a, then for any natural number k, the limit of XN + k is a
• 7. Let the square number y ^ 2 be the sum of the squares of 11 consecutive integers, and find the minimum value of Y It's the sum of squares! It's not the sum of squares
• 8. A is a non-zero natural number. The largest number in the following formula is () A.A × 3 / 5 B.A △ 3 / 5 C.A △ 8 / 5
• 9. A is a natural number greater than 0. The largest number in the following formula is () A is a natural number greater than 0. The largest number in the following formula is () A.A divided by four fifths B.A multiplied by four fifths C.A divided by one and four fifths
• 10. A. B and C are all non-zero natural numbers. The following can show that the formula of a > b is () A.A △ 1 B.A / C1
• 11. How much more is the difference between 7 and 7 / 10 than 4 / 5
• 12. -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=
• 13. 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,
• 14. Two thirds of a number is four times more than two thirds of thirty
• 15. One third of a number is 30 less than 50% of 120. Find the number
• 16. 25 of a number is exactly 23 of 50. This number is______ ．
• 17. A number less than 2 / 2 of a number is 3 / 5. Find this number
• 18. Observe the following group of data, according to a certain rule, the appropriate number on the horizontal line: - 5, - 2,1,4, () 10
• 19. 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
• 20. 8 minus 9 out of 10 is more than 4 out of 5,