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-What is the square of 2? What is the square of (- 2)? Is the square of a negative number negative as long as there are no brackets?
-The square of 2 is - 4. The square of (- 2) is 4. Yes
What does it mean to put a bracket next to a negative number
Negative numbers in brackets are the same as usual
But in some calculations, it's not the same with or without brackets
For example, - 2 ^ 2 and (- 2) ^ 2 have different results
The former is - 4, the latter is 4
Why should negative numbers be bracketed in operation
If negative is at the top, do not bracket it
RELATED INFORMATIONS
- 1. Negative numbers in parentheses Merge similar items and evaluate them! For example: - b-7ab. Suppose B is 2 and a is 3, what is the format? - B need to add brackets?
- 2. How to calculate negative number before bracket when merging similar items?
- 3. Must negative numbers be rational numbers
- 4. The subtraction rule of rational number is: subtracting a number is equal to what is the opposite of this number
- 5. Mixed operation of rational number addition and subtraction (+ 7 / 4) + (- 1 / 4) - (+ 16 / 7) - (- 16 / 7)
- 6. On the addition and subtraction of rational numbers: (+ 9) - (+ 21) (2) (- 12) - (+ 18) (3) 0 - (- 63) (4) (- 32) - 0 (5) (- 5.4) - 2.8 And: (6) (+ 37.9) - (- 5.1) (7) (- 15) - (8-9) (8) (8-2) - (14-9)
- 7. Cut out a square of the same size at each corner of the square paperboard with side length of 16 cm, and fold it into the sum of a cuboid without cover. 1. If the side length of the cut small square is xcm, please use X to indicate the volume of the carton. 2. When the side length x of the cut small square is 3cm and 3.5cm respectively, the volume of the two folded open cuboid cartons is compared.
- 8. Add addition, subtraction, multiplication and division or brackets to the appropriate place of the following formula to make the formula hold. 4 = 5
- 9. Multiply a number by 10, the number is 36 more than the original number, the original number is []
- 10. It can't be replaced by X. it can only be replaced by ordinary multiplication, division, addition and subtraction,
- 11. According to the law of subtraction, the number of rational numbers According to the law of subtraction, the mixed operation of addition and subtraction of multiple rational numbers can be transformed into an operation that only contains addition. However, in a sum, the brackets of each addend and the family members in front of it are usually omitted, such as (- 8) - (- 10) + (- 6) + (+ 4), and it is rewritten to the sum that only contains addition_____________ In the form of an ellipsis______________ Read as______________________ Or________________ .
- 12. Find some problems of mixed operation of rational number addition and subtraction
- 13. How to do the 0-1 + 2-3 + 4-5 mixed operation of rational number addition and subtraction,
- 14. On the sign of inequality That is to say, multiplication or division of a negative number on both sides of an inequality requires a sign change, for example, negative half a > - 1. I remember the teacher said that negative should be changed, but our classmates said that it would not change, and it was right to do it, and - one in a
- 15. Does the sign outside change when the bracket is removed from the equation of degree one variable?
- 16. Is it true that 9, 9 and 9 are equal to 5 with any sign?
- 17. Select 10 from 1 / 2,1 / 3,1 / 4,1 / 5 -- 1 / 90,1 / 91 and add the sign to make the sum equal to - 1
- 18. There are 90 Egyptian scores: one half, one third, one ninety-one. Pick out five and add a sign to make their sum equal to minus one
- 19. How to make the result of the formula equal to 45?
- 20. The number from 1 to 6 is equal to 100 with an operation symbol added in the middle