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Solving Math 3 exercises on page 29 of Cánh Diều Workbook Volume 2
Solving exercises on page 29 of Math 3 Workbook Volume 2, Cánh Diều:
Rounding numbers to the nearest ten, hundred
1. Solve Exercise 1 Page 29 Math Grade 3 Workbook
Problem: Observe the number lines below and round the numbers 44, 57, 72, 85 to the nearest ten:
Solution guide:
Observe the number lines, determine which multiple of ten each given number is closer to, then conclude.
If the unit digit is 5, round up.
Answer:
- Rounding the number 44 to the nearest ten, we get 40 (because 44 is closer to 40 than 50)
- Rounding the number 57 to the nearest ten, we get 60 (because 57 is closer to 60 than 50)
2. Solve Exercise 2 Page 29 Math Grade 3 Workbook
Problem: Observe the number lines below and round the numbers 312, 350, 384 to the nearest hundred:
Solution guide:
Observe the number lines, determine which multiple of hundred each given number is closer to, then conclude.
If the tens digit is 5, round up.
Answer:
- Rounding the number 312 to the nearest hundred, we get 300 (because 312 is closer to 300 than 400)
- Rounding the number 350 to the nearest hundred, we get 400.
- Rounding the number 384 to the nearest hundred, we get 400 (because 384 is closer to 400 than 300)
- See also: Solve exercises on pages 31, 32, 33 of Math 3 Workbook Volume 2, Cánh Diều
3. Solve Exercise 3 Page 29 Math Grade 3 Workbook
Problem: Đức wants to choose a box of candy with about 200 pieces. In your opinion, which box should Đức choose?
Solution guide: Apply the method of rounding numbers to the nearest hundred to determine the box of candy Đức should choose.
Answer:
Rounding the number 219 to the nearest hundred, we get 200 (because 219 is closer to 200 than 300).
Rounding the number 290 to the nearest hundred, we get 300 (because 290 is closer to 300 than 200).
Rounding the number 146 to the nearest hundred, we get 100 (because 146 is closer to 100 than 200).
So Đức should choose box A.
Solving exercises on page 29 of Math 3 Workbook Volume 2, Cánh Diều provides extremely detailed guidance for exercises 1, 2, 3, hoping students can easily complete the exercises, grasp the knowledge of this lesson effectively.
