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Solving Math for Grade 3 on pages 31, 32, 33 of Cánh Diều workbook volume 1
Solving exercises on pages 31, 32, 33 of Math 3 Workbook Volume 2, Cánh Diều:
Rounding numbers up to thousands, tens of thousands
1. Solve Exercise 1 Page 31 Math Grade 3 Workbook
Problem: Round the following numbers to the nearest thousand:
Solution Guide:
Observe the number line, determine which thousand each given number is closer to, then conclude.
If the hundreds digit is 5, round up.
Answers:
a) Rounding 3,400 to the nearest thousand gives us 3,000 (because 3,400 is closer to 3,000 than 4,000).
b) Rounding 8,900 to the nearest thousand gives us 9,000 (because 8,900 is closer to 9,000 than 8,000).
2. Solve Exercise 2 Page 31 Math Grade 3 Workbook
Problem: Round the following numbers to the nearest ten thousand (following the example):
Solution Guide: Observe the number line, determine which ten thousand each given number is closer to, then conclude.
If the hundreds digit is 5, we round up.
Answers:
a) We observe: Number 42,000 is closer to 40,000 than 50,000.
So: When rounding 42,000 to the nearest ten thousand, we get 40,000.
3. Solve Exercise 3 Page 32 Math Grade 3 Workbook
Problem: Perform the following tasks:
a) Round 1,234 to the nearest ten.
b) Round 1,234 to the nearest hundred.
c) Round 1,234 to the nearest thousand.
Guidance: Determine whether the number 1,234 is closer to the nearest ten, hundred, or thousand, then conclude.
Answers:
a) We observe: number 1,234 is closer to 1,230 than 1,240.
So: Rounding 1,234 to the nearest ten, we get 1,230.
b) We observe: number 1,234 is closer to 1,200 than 1,300.
So: Rounding 1,234 to the nearest hundred, we get 1,200.
c) We observe: number 1,234 is closer to 1,000 than 2,000.
So: Rounding 1,234 to the nearest thousand, we get 1,000.
4. Solve Exercise 4 Page 32 Math Grade 3 Workbook
Problem: Choose the letter to put before the correct answer:
Guidance: Determine which hundred, thousand each given number is closer to, then conclude.
Answers:
a) We observe: Number 5,490 is closer to 5,000 than 6,000.
So: Rounding 5,490 to the nearest thousand, we get 5,000. Choose C.
b) We observe: Number 9,628 is closer to 9,600 than 9,700.
So: Rounding 9,628 to the nearest hundred, we get 9,600. Choose D.
- Read more: Solve exercises on pages 34, 35 Math Grade 3 Workbook Volume 2, Cánh Diều book
5. Solve Exercise 5 Page 33 Math Grade 3 Workbook
The distances: a) Hanoi to Lang Son: 150 km. b) Hanoi to Ha Nam: 60 km. c) Ho Chi Minh City to Long An: 50 km. d) Ho Chi Minh City to An Giang: 240 km. e) Ho Chi Minh City to Kien Giang: 250 km.
Distances: a) Hanoi to Lang Son: 150 km. b) Hanoi to Ha Nam: 60 km. c) Ho Chi Minh City to Long An: 50 km. d) Ho Chi Minh City to An Giang: 240 km. e) Ho Chi Minh City to Kien Giang: 250 km.
Approximate distances: a) Hanoi to Lang Son: 150 km. b) Hanoi to Ha Nam: 60 km. c) Ho Chi Minh City to Long An: 50 km. d) Ho Chi Minh City to An Giang: 240 km. e) Ho Chi Minh City to Kien Giang: 250 km.
Here are the distances: a) Hanoi to Lang Son: ~150 km. b) Hanoi to Ha Nam: ~60 km. c) Ho Chi Minh City to Long An: ~50 km. d) Ho Chi Minh City to An Giang: ~240 km. e) Ho Chi Minh City to Kien Giang: ~250 km.
Question 6 on Page 33 of Math Textbook for Grade 3
The direct flight from Hanoi, Vietnam, to the capital Paris, France, covers approximately 9,000 km. Round this distance to the nearest thousand.
Solution: Determine which thousand the number 9,190 is closer to and conclude.
Answer: The number 9,190 is closer to 9,000 than 10,000. Therefore, rounding 9,190 to the nearest thousand, we get 9,000. So, the distance from Hanoi to Paris is approximately 9,000 km.
Solutions for exercises on pages 31, 32, and 33 of Math Book 3 Volume 2, Cánh Diều, have been meticulously explained, including solutions for Exercise 1, Exercise 2... of the lesson. Compare your answers with the solution to improve your math skills and make problem-solving easier.
