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Solving 3rd-grade Math problems on pages 18 and 19 of Bright Horizon Innovative Book Volume 2
Solving exercises on pages 18 and 19 of Math 3 Textbook Volume 2, Bright Horizon Innovative Book:
What have you accomplished?
1. Solving Exercise 1 on Page 18 of Math 3 Textbook
Problem Statement: Which statements are correct, and which are incorrect?
Solution Guide: Based on the decomposition of numbers into thousands, hundreds, tens, and ones, observe the illustrations and determine the correct and incorrect statements.
Answers:
a) 2 133 = 2 000 + 100 + 30 + 3. So statement a is correct.
b) 5 960 = 5 000 + 900 + 60. So statement b is correct.
c) 7 407 = 7 000 + 400 + 7. So statement c is incorrect.
d) 9 090 = 9 000 + 90. So statement d is correct.
2. Solving Exercise 2 on Page 18 of Math 3 Textbook
Problem Statement: Choose the correct answer.
Solution Guide:
- To find the unknown term, subtract the given sum from the total.
- To find the subtracted term, subtract the difference from the total.
- To find the term being subtracted, add the difference to the subtracted term.
Answers:
3. Solving Exercise 3 on Page 19 of Math 3 Textbook
Problem Statement: Set up and calculate.
Solution Guide:
Write addition and subtraction vertically so that digits in the same place align.
Add or subtract numbers from right to left.
Answers:
4. Solving Exercise 4 on Page 19 of Math 3 Textbook
Problem Statement: Replace .?. with appropriate arithmetic operators (+, -, ×, ÷)
Solution Guide: Mentally calculate the results of the arithmetic operations and then write the appropriate operator for each operation.
Solution Guide:
- Step 1: The amount of rice provided in the second round = Amount of rice provided in the first round - 450 kg.
- Step 2: The total kilograms of rice provided for both rounds = Amount of rice provided in the first round + Amount of rice provided in the second round.
Answer:
In the second round, the area was provided with: 2,350 - 450 = 1,900 (kg) of rice
For both rounds, the area was provided with: 2,350 + 1,900 = 4,250 (kg) of rice
Final answer: 4,250 kg of rice.
6. Solve Exercise 6 on Page 19 of Math Grade 3 Workbook
Problem Statement: What number?
The North-South railway (from Hanoi to Ho Chi Minh City) passes through many provinces and cities, including Vinh City (Nghe An Province).
Solution Guide:
To find the distance from Vinh to Ho Chi Minh City, subtract the distance from Hanoi to Vinh from the distance from Hanoi to Ho Chi Minh City.
Answer:
The distance from Vinh to Ho Chi Minh City is: 1,726 - 319 = 1,407 (km).
So, we fill in the number 1407.
Solve exercises on pages 18 and 19 of Math Grade 3 Workbook Volume 2, from the Creative Horizon series. We hope you can do the exercises well and reinforce your knowledge from the lesson easily.
