Fourth grade volume I mathematics exercise book page 23 answers

Problem solving

RELATED INFORMATIONS

1. It is known that, as shown in the figure, in the trapezoidal ABCD, ad ‖ BC, let ad = vector a, BC = vector B, e and f respectively on the waist AB and DC, and AE: be = DF: CF = 1:2 (1) Using the linear combination of vectors a and B to represent vector ef (2) Is EF parallel to ad? Why? (3) If ad = m, BC = n, find the length of EF
2. A triangle can be formed by three line segments with length of 3M, 5M and 16 (M > 0)
3. Given PA, vertical plane ABC, AB, vertical BC, verification, plane PBC, vertical plane PAB
4. Try to discuss the relationship between the straight line X-my + 2 = 0 and the circle x ^ 2 + y ^ 2 = 4 according to the value of M
5. In the fifth power of the polynomial ax plus the third power of BX minus 3, when x is equal to 3, the polynomial is 5, and when x is equal to negative 3, the value of the polynomial is obtained
6. Solving inequality system: 3 / 2x-2
7. Solution equation: 3.5 (X-5) + 0.5x = 4.25 (x is unknown)
8. Calculation: the first (3Y & # 178;), # 179; - 5Y & # 178; [the fourth power of 2Y - Y (3y-1 / 5)]; Second: given X & # 178; - 2x = 2, simplify the following formula first, and then evaluate: (x-1) &# 178; + (x + 3) (x-3) + (x-3) (x-1) Third: Factorization factor: 2x & # 178; + 2xy-3x-3y;
9. 2X multiplied by 6 minus 24 equals 12 plus 3x
10. Factorization factor (x + y) (x + y + 2XY) + x ^ 2Y ^ 2-1
11. Please write down all the answers in the first volume of the fourth grade mathematics exercise book. Thank you!
12. Sixth grade mathematics: fraction mixing, simple operation. Very urgent! It's going to be used tonight! Could you hurry up, please? 1/7×6/13+8/13×1/7=? 2-5/11÷9/22-5/9=? （5/6-3/4）÷5/12+9/5=? Write out the process ~ ~ online waiting, thanks!
13. Simple calculation of 1003 × 996 grade 6 mathematics
14. Requirements: four operations, must have scores, preferably with brackets It's hard! There are more than three steps, and there are simple operations. But the answer should be better, The answer should not have negative numbers and too many circular decimals Don't fool people by copying from the Internet
15. In a division formula, if the sum of the product of division and quotient plus the divisor is 32.8, and the quotient is the smallest sum, what is the divisor? What is the divisor?
16. 2001 out of 2002 times 2003 It's the easiest
17. Knowledge and ability training of grade 6 A rectangular glass fiber reinforced plastic container with a bottom area of 96 square centimeters and a height of 10 centimeters contains 5 centimeters of water. Now put an iron bead into the water, and the water surface rises by 2 centimeters. What's the volume of the iron bead? At least a few such iron beads should be put before the water overflows the glass container? The teacher said it was about three!
18. Mathematics knowledge and ability training 8 pages
19. Knowledge, ability and training of Mathematics (Grade 6) 1. Xiaogang rode a bicycle. It took 0.6 hours to travel 12 kilometers. The ratio of distance to time is () 2. The circumference of a rectangle is 50 meters, and the ratio of length to width is 3:2. The length of the rectangle is () meters 3. The ratio of Mingming and Liangliang stamps is 2:5. Liangliang has 105 stamps and Mingming has () stamps 4. The ratio of number a to number B is 4:5. Number a is a fraction of number B, and number B is a fraction of the sum of number a and number B 5. 20% off a book is 16 yuan. The original price of this book is () yuan
20. How to do the knowledge and skills of exercise 1.2