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Xiao Ming and Xiao Gang collected 121 cards. It is known that one fifth of the number of Xiao Ming's cards is equal to one sixth of the number of Xiao Gang's cards. How many cards do Xiao Ming and Xiao Gang collect? Find the formula and explain
Xiaoming 55, Xiaogang 66, elementary school arithmetic
Xiao Gang: I'm one fifth heavier than Xiao Hua. Xiao Hua: my weight is 35 kg. Xiao Ming: I'm one seventh lighter than Xiao Hua. How many kg do they weigh?
Xiaogang weighs 42 kg
Xiaoming weighs 30 kg
What are their weights? Xiaohua: 35kg Xiaogang: Xiaohua is 1 / 6 heavier than Xiaogang Xiaoming: 1 / 7 lighter than Xiaohua
Xiaogang: 35 ÷ (1 + 1 / 6) = 30kg
Xiaoming: 35 × (1-1 / 7) = 30kg
A cuboid water tank, measuring 28cm in length, 25cm in width and 20cm in height, is filled with half a tank of water. Put eight square iron blocks with 5cm in length into the water tank, so that the iron blocks are completely immersed in the water. How many centimeters has the water in the water tank risen? (the number is reserved for 2 decimal places) my daughter can't do it
The volume of iron block v = 8 * 5 ^ 3 = 1000 (cubic centimeter) = 1 cubic decimeter;
Water surface area of water tank s = 28 * 25 = 700 (square centimeter) = 7 square decimeter;
The water surface elevation H = V / S = 1 / 7 = 0.14 (decimeter) = 1.4cm
There is a mathematical operation symbol "⊗", so that the following formula holds: 2 ⊗ 4 = 10, 5 ⊗ 3 = 18, 3 ⊗ 5 = 14, 9 ⊗ 7 = 34. Find 7 ⊗ 3=
From the meaning of the title, the meaning of the operation symbol "⊗ B" is a ⊗ B = 3A + B, so 7 ⊗ 3 = 3 × 7 + 3 = 24; answer: 7 ⊗ 3 = 24
8 square meters = () square decimeters = () square centimeters
8 square meters = (80) square decimeters = (8000) square centimeters
1. Storybooks are one fifth more than science and technology books. Storybooks are ()% of science and technology books. What percentage are science and technology books less than storybooks?
dfsf
Mathematics calculation of grade 6 in primary school (Olympiad Mathematics) please answer in detail, thank you! (28 13:34:17)
1 + 1 + 1 +…… + 1
1+2 1+2+3 1+2+3+4 1+2+3… +50
3-2 + 4-3 + 5-4 + 6-5 + .+ 51-50
1+2 1+2+3 1+2+3+4 1+2+3+4+5 1+2+3… +50
=1-2/3+2/3-1/2+1/2-2/5+2/5-1/3+.+1/25-2/51
=1-2/51
=49/51
How many units of measurement are used in accounting?
I'll look through the books for you
Accounting takes money as the main measure
1: Physical measurement: (kg, t, m, set, piece, etc.)
2: Labor measurement: (working days, working hours, etc.)
3: Monetary measurement: (yuan, Jiao, etc.)
Primary school Chinese sixth grade summer homework, No. 36, reading answers
For willows, spring rain is (green)
Spring rain is (red) color for peach blossom
Spring rain is (yellow) color for rape fields
Spring rain is (blue) color to the sea
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RELATED INFORMATIONS
- 1. Xiaogang is 1 / 5 heavier than Xiaohua. Xiaohua's weight is 35 kg. Xiaoming is 1 / 7 lighter than Xiaohua. How many kg do they use the equation to solve
- 2. Xiaohua weighs 35 kg. Xiaogang weighs 1 / 5 more than Xiaohua. What's Xiaogang's weight
- 3. It costs 1 / 3 of the total money to use a pen and 4 yuan to buy a story book. At this time, the ratio of the money spent to the rest is 5:4. What is the original money? How to write this question?
- 4. Xiaohua weighs 35 kg, which is 5 / 7 of Xiaogang's weight. How many kg does Xiaogang weigh A ballpoint pen costs 3 / 2 yuan, which is exactly 1 / 8 of a pen. How much is a pen
- 5. Xiao Ming, Xiao Liang and Xiao Gang have played table tennis. Xiao Ming has played five games, Xiao Liang has played four games and Xiao Gang has played three games. How many games have these three children played in total? The specific calculation method is needed It's right to say this, say that, and say that
- 6. Xiaogang is 3.64kg heavier than Xiaoming, and Xiaoli is 2.8kg lighter than Xiaoming. Who is heavier, Xiaogang and Xiaoli? How many kg? There should be steps,
- 7. Xiao Gang has read a 250 page story book for five days, with an average of 26 pages a day, and the rest 30 pages a day. How many days will it take to finish?
- 8. Xiao Li asks Xiao Gang to think of a number at will, and then multiplies it by 5 minus 7, then multiplies it by 2 and subtracts the above formula by - 14. Finally, she tells her the result. She just needs to divide the result by - 10 to know what Xiao Gang thinks. Please explain the reason with what she has learned
- 9. 1. A cylindrical oil barrel, measured from the inside, has a bottom diameter of 40 cm and a height of 60 cm. Can this oil barrel hold 80 liters of oil? 2. A cylindrical milk powder box, the volume is 5024 cubic centimeters, the bottom radius is 10 cm. How high is it? 3. A cylinder shaped steel part has a bottom area of 5 square centimeters and a length of 8 centimeters. If each cubic centimeter of steel weighs 7.8 grams, how many grams does the part weigh? 4. A cylindrical glass, measured from the inside, has a bottom diameter of 6cm and a depth of 10cm. How many milliliters of water can this glass hold at most? (mark the question number)
- 10. The area of Lele's room is 15.4 square meters. The floor is paved with 0.4 meter long square bricks, and 100 such bricks are prepared,
- 11. The average weight of Xiaoming and Xiaoliang is 41.5kg. The average weight of Xiaoliang and Xiaoqiang is 46kg. The average weight of Xiaoming and Xiaoqiang is 45.5kg. What's the weight of Xiaoming, Xiaoliang and Xiaoqiang? Formula
- 12. Xiao Gang read a story book. He planned to read 39 pages a day and finish it in 30 days. Actually, he finished the book in 26 days. How many pages a day on average?
- 13. Xiao Gang and Xiao Ming donated 28 books in total. Xiao Gang donated 6 more than Xiao Ming. How many books did Xiao Gang and Xiao Ming donate to solve the equation
- 14. Xiao Ming and Xiao Gang are about 1.7 * 10 & sup2; in height, but is Xiao Ming right when he says, "Xiao Gang is 9cm shorter than me"
- 15. How many years later, mother's age is three times the age of Xiaoqiang?
- 16. Mingming is 12 years old and Qiangqiang is 7 years old. When the sum of their ages is 45, how old are they?
- 17. Wei Wei is 8 years old and his father is 34 years old______ My father is three times as old as Wei Wei
- 18. My father is four times older than Xiaogang this year. Five years later, my father is 24 years older than Xiaogang. How old is Xiaogang five years later?
- 19. My grandfather is 84 years old, which is three times of my father's age. My father's age is seven times of Xiaogang's age
- 20. Xiaoying is three years younger than Xiaoming. This year, their age is half the age of the teacher. In another 15 years, their age is equal to the age of the teacher. This year, Xiaoying is a teacher______ I'm 40 years old