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Exercise 52 Concentrated Review will focus on exercises recognizing numbers in the tens of thousands, millions, and how to convert years to centuries... Below is the solution for 4th-grade math on pages 116, 117, 118 of the Kite Wings book, Unit 1, Concentrated Review with accurate explanations.
Refer to additional 4th-grade math resources:
- 4th-grade math Kite Wings book
- 4th-grade math on pages 127, 128, 129, 130 of the ICT book, Unit 1 - Exercise 37: Concentrated Review
Solving 4th-grade Math Kite Wings Unit 1 pages 116, 117, 118
Exercise 52: Concentrated Review
1. Solve problem 1 - Kite Wings 4th grade Unit 1 page 116
Problem:
Choose the correct answer.
a) Sixty-eight thousand three hundred and six is written as:
A. 60,836.
B. 608,306.
C. 6,836.
D. 68,306.
b) A number composed of 9 million, 2 tens of thousands, 3 thousand, 8 hundred, and 7 units is:
A. 9,238,007.
B. 9,020,387.
C. 9,203,807.
D. 9,023,807.
c) The largest number among 589,021, 589,201, 598,021, 589,102 is:
A. 589,021.
B. 589,201.
C. 598,021.
D. 589,102.
d) Rounding 547,819 to the nearest hundred thousand gives:
A. 547,820.
B. 548,000.
C. 550,000.
D. 500,000.
e) In 1903, the invention of the airplane was announced. In which century was the airplane invented?
A. XIX.
B. XX.
C. IXX.
D. XXI.
g) A truck carries 1 ton 6 hundredweight of rice. How many kilograms of rice did the truck carry?
A. 160 kg.
B. 16,000 kg.
A. A group of 32 friends.
B. An assembly of 44 companions.
C. A gathering of 22 pals.
D. A squad of 16 buddies.
k) Hùng, Bách, Dũng, and Nam have respective weights of 32 kg, 38 kg, 36 kg, and 34 kg. The average weight per person in kilograms is:
A. 34 kg.
B. 35 kg.
C. 36 kg.
D. Weighs 38 kg.
Solution Method:
Read carefully and answer the question.
Answer:
a) Answer D
b) Answer A
c) Answer C
d) Answer D
e) Answer B
g) Answer C
h) Answer C
i) Answer D
k) Answer B
2. Solve problem 2 - Kite Class 4 Book 1 page 117
Problem Statement:
Set up and then solve:
a) Calculate 378,021 + 19,688
c) Find the product of 12,406 multiplied by 31
b) Subtract 7,361 from 85,724
d) Divide 7,925 by 72
Solution Method:
Set up and perform addition, subtraction, multiplication, and division operations.
Answer:
3. Solve problem 3 - Kite Class 4 Book 1 page 117
Problem Statement:
Read the following information:
Answer the questions:
a) To produce 12 tons of plastic, how many tons of water are needed?
b) To produce 20 tons of steel, how many tons of water are needed?
c) To manufacture 5 tons of paper, how many tons of water are required?
Solution Method:
Observe the diagram and perform the calculation for the number of tons of water.
Answer:
a) To produce 12 tons of plastic, the required amount of water is:
2,000 x 12 = 24,000 (tons)
b) To manufacture 20 tons of steel, the necessary amount of water is:
20 x 20 = 400 (tons)
c) To manufacture 5 tons of paper, how many tons of water are needed?
40 x 5 = 200 (tons)
4. Solve problem 4 - Kite Class 4 Book 1 page 117
Problem Statement:
To cook one bowl of rice, Lam needs approximately 75 grams of rice. If Lam eats 4 bowls of rice daily, then in 30 days, how many kilograms of rice will Lam consume?
Solution Method:
Amount of rice consumed in 30 days = Amount of rice consumed in 1 day x 30
Answer:
Each day, Lam consumes the amount of rice:
75 x 4 = 300 (grams)
In 30 days, Lam consumes the amount of rice:
300 x 30 = 9,000 (g) = 9 (kg)
5. Solve problem 5 - Kite Class 4 Book 1 page 118
Problem Statement:
A piece of wood is cut into 20 equal parts. Determine the length of each piece in centimeters (neglecting the saw blade).
Solution Method:
Length of each piece = Length of wood plank : Number of pieces
Answer:
Convert: 4 m = 400 cm
Each piece has a length of:
400 : 20 = 20 (cm)
Answer: 20 cm
6. Solve problem 6 - Kite Class 4 Book 1 page 118
Problem Statement:
a) Hong packed purple onions into bags, harvesting 132 bags, each weighing 5 kg. If Hong packs these purple onions into bags, each weighing 3 kg, how many bags will he have?
b) Purple onions weighing 5 kg are sold for 195,000 VND. How much does 3 kg of purple onions cost at the same price?
Solution Method:
Number of 3 kg bags = Harvested weight : 3
Cost of 3 kg of purple onions = Cost of 1 kg of purple onions x 3
Answer:
a) The harvested weight of purple onions is:
132 x 5 = 660 (kg)
If 660 kg of purple onions are packed into 3 kg bags, the number of bags obtained is:
660 : 3 = 220 (bags)
b) The amount of money earned from selling one kilogram of purple onions is:
195,000 : 5 = 39,000 (VND)
Three kilograms of purple onions earn:
39,000 x 3 = 117,000 (VND)
7. Solve problem 7 - Kite Class 4 Book 1 page 118
Problem:
In the elevator, Linh notices a sign that reads 'Maximum capacity: 12 people. Maximum weight: 900 kg.' According to Linh, if the elevator has carried the maximum weight with 12 people inside, what is the average weight of each person in kilograms?
Solution:
Average weight = Maximum weight : Maximum number of people
Answer:
The average weight of each person is:
900 : 12 = 75 (kg)
Result: 75 kg
Exploring 4th-grade math on pages 116, 117, and 118 of the 'Cánh Diều' workbook, Unit 1. Focusing on consolidation, problem 52 helps students review crucial concepts like identifying tens of thousands, millions, and problems related to the century... Previously, Mytour provided guidance on Solving 4th-grade math on pages 113, 114, 115 of the 'Cánh Diều' workbook, Unit 1 - Problem 51. Enjoy learning math, and feel free to revisit to solidify the array of knowledge indispensable for the first semester.
