A: Make a triangle.
Page 14 Save water:
A faucet: I dropped 48 liters of water one night.
B faucet: I dropped 52 liters of water one night.
Please calculate how much water these two faucets lose in a week. How about a month?
One week: (48+52)×7=700L
One month: (48+52) × 30 = 3000 L.
Or: (48+52)×3 1=3 100L.
Normal doesn't count as 28 days, 29 days.
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Tiger: My height consists of nine 0. 1 m and seven 0.0 1 m. My height is 0.97 meters. My weight is 0.3 1 ton, which consists of (3) 0. 1 ton and (1) 0.0 1 ton.
Elephant: My height is 2m 1 1cm, which can be written as (2.11) m; My weight is 3 tons 230 kilograms, which can be written as (3.23) tons.
Deer: My height is 60 decimeters, that is, (6) meters, and my weight is 300 kilograms. (300 kg = 0.3 ton)
Hippo: I am 150 cm tall and weigh 2000 kg, which is (1.5) meters and (2) tons.
The champion of height is (deer) and the champion of weight is (hippo).
Athletes' shot put scores are as follows: pig 6.7 1 m, bear 9.44 m, lion 6. 17 m, orangutan 7. 16 m and leopard 7.61m. Please rank their top three.
Bear > Leopard > Orangutan > Pig > Lion (arranged for you)
The results of 4000-meter runners are as follows: rabbit13min 2 1 sec, goat13min1sec, pony1min 52s, deer12min 30s. Please list their top three.
Pony > deer > goat > rabbit (I have arranged an order for you)
There is also a stair climbing competition in the sports meeting. Every time you go up a floor, you need to climb 18 stairs. The little monkey was the first to climb from 1 to 16. How many stairs did he climb? (Note: There is no need to climb stairs on the first floor)
( 16- 1)× 18=270.
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Chorus competition, 4 1 class students stand in four rows, each row 13 people, with one student conducting and two students leading. How many students are taking part in the chorus competition in this class?
4× 13+ 1+2=55.
The front of the stage is 18 meters long, and a pot of flowers should be placed every 5 minutes. How many potted flowers should I prepare?
18m = 180m
180÷5+ 1=37 pots
At the art festival, students take part in the group dance performance and form a formation on the left. Six people on each side of the outer layer. How many people are there on the outer floor? How many people are there on the inner and outer floors?
Outer layer: 6×4-4=20 people.
* * *: 6× 6-2× 2 = 32 people.
These students changed their formation and formed a big circle. Every two adjacent students are 1 m. What is the circumference of this circle? If you think my diagram is not good, you don't have to answer tut-tut. )
32× 1 = 32m
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According to the regulations, freshmen and sophomores need to attend four physical education class classes a week, and juniors, seniors, seniors, seniors and seniors need to attend three physical education class classes a week. Sunshine Primary School has four classes in each grade. How many classes of physical education class do you need every Monday? A PE teacher has sixteen physical education class classes every week. How many PE teachers does the school need at least?
4×4×2+3×4×4=80 knots
80÷ 16=5 digits
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5L engine oil 45 yuan 2L engine oil 20 yuan 1L engine oil 12 yuan.
Which pot of oil of the same brand has the highest cost performance? Why?
Because 45÷5=9 yuan
20÷2= 10 yuan
9 yuan < 10 yuan < 12 yuan. Therefore, it is most cost-effective to buy 5L oil.
I also need to buy soy sauce, chicken essence, soap and shampoo at home. Please help me choose, the cost can't exceed that of 30 yuan.
Soy sauce: 500g, 4 yuan. 500 grams, 3 yuan.
Chicken essence: 100g, 7 yuan. 100g, 4.4 yuan.
Soap: three bars of soap *** 13 yuan. A bar of soap, 4.5 yuan.
Shampoo: 200ml 16.5 yuan. 400 ml is 28.6 yuan.
You can choose a bar of soap made in 3 yuan, soy sauce, 200ml shampoo made in 4.4 yuan and chicken essence.
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Lean meat: 17 yuan/kg chicken: 24 yuan/kg fish: 10 yuan/kg ribs: 38 yuan/kg lotus root: 6 yuan/kg tomato: 6 yuan/kg beans: 3 yuan/kg ginger: 10 yuan/kg cabbage: 22 yuan/kg.
Today I want to stew lotus root ribs soup. I want to buy half a catty of lotus root, 1 catty of ribs. How much will it cost?
6× 1/2+38=4 1 yuan
Mom needs side dishes. How much does it cost to buy half a kilogram of tomatoes (written as decimal 0.5) and one tenth kilogram of ginger (written as decimal 0. 1)?
6×1/2+10×110 = 4 yuan.
Xiaoli wants to fry a piece of Chinese cabbage for her mother to taste. Help her see how much cabbage and lean meat need to be bought and how much it costs.
Chinese cabbage:111kg, lean meat: 1/2 kg. 22×111+17×1/2 =10.5 yuan.
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How many times or fractions of 0.75 are the following figures?
750 7.5 0.075 0.7500 75
750 is 0.75 1000 times.
7.5 is 0.75 10 times.
0.075 is 0.75110.
0.7600 is 1 times 0.75.
75 is 0.75 100 times.