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The first unit of mathematics in the seventh grade
East China Normal University Press. Mathematics, Grade 7, Volume 2
Chapter 6: one variable linear equation
The transformation of the equation, the method of solving linear equation with one variable,
Chapter 7: binary linear equations
The solution of bivariate linear equation, the solution of bivariate linear equation, (formula method, collocation method, substitution method, direct method)
Practice and exploration
This is unit one
RELATED INFORMATIONS
- 1. There are 100 chickens and rabbits in total, and the number of legs of chickens is 30 less than that of rabbits. How many of them are there? It's 28 less
- 2. The fourth grade of primary school mathematics for the next semester
- 3. Simple calculation of 8 / 13 / 7 + 1 / 7 * 6 / 13
- 4. What's the answer to the second question on page 68 of volume two of grade four? There is a square flower bed in Dongshan primary school. When the campus was built, the opposite sides of the flower bed were increased by 3 meters each. In this way, the flower bed became a rectangle, with an area of 24 square meters more than the original. How many square meters was the original flower bed My answer was 64, but the child came back and said that the teacher's answer was 16. The teacher made an article on "a group of opposite sides" and "each side". That is to say, the two ends of the original square were extended by 3 meters. The calculation result was 16 square meters. Our parents didn't know which answer was right
- 5. There are 62 basketball, football and volleyball, of which three fifths are basketball and two thirds are volleyball and 24 are football. How many are basketball and volleyball
- 6. Mathematics problems of grade nine (quadratic function) How to judge a + B + C A-B + C 8A + 6B + 2C is not greater than 0
- 7. The original price of a kind of TV set is 2500 yuan, and the sales promotion in the market is 1 / 5. After the activity, the price is increased by 1 / 5. How much is the current price of this kind of TV set?
- 8. 1. A cuboid, 4 decimeters long, 0.4 decimeters more than wide, the same height and width, its volume is * * cubic decimeters 2. The 6060 bricks, 20 cm long, 10 cm wide and 5 cm high, are neatly stacked together. The volume of this pile of bricks is * * M & sup3
- 9. A washing machine now sells for 204 kg, which is 21% cheaper than the original price. How much is the original price? Use the equation. Thank you
- 10. The more the better, the good can add points As long as the ordinary fraction or decimal calculation and application, do not judge the choice, application to write out the process
- 11. The sum of three consecutive even numbers is 3A (a is not equal to 0), where the largest is (), and the smallest is ()
- 12. How to write the last question on page 11
- 13. A measuring cylinder containing 280 ml of water. After placing a glass marble, the water surface rises to 300 ml. the volume of this glass marble is______ ．
- 14. Y = [the square of (x1-x) plus the square of (x2-x) plus the square of x3-x] divided by 3
- 15. 2 / 3, 8 / 9, 2 / 3, 4 / 3, 2, (), fill in a number in the bracket to make the sequence hold,
- 16. People's education press fifth grade volume I mathematics textbook page 72 application question 4 how to do. Ask you a favor. In the afternoon Six pop cans and nine beverage bottles, each of which costs the same. The total price is 1.5 yuan. How much is each? Do it by solving the equation. seek
- 17. Sequence 2, 6, 12, 20, 30, 42 What's next?
- 18. After rain, the sky and the earth are more like filtered, especially fresh Correct the wrong sentence
- 19. Uncle Li's family has 42 chickens, half of which are ducks. How many chickens and ducks do Uncle Li's family raise?
- 20. Which word is the instrument of measurement or calculation And what's the word "hear" or "hear"