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Solve Grade 3 Math on pages 66, 67, 68 of Workbook Volume 2
Solve exercises on pages 66, 67, 68 of Math 3 Workbook Volume 2, Connect Knowledge with Life
Concentration Practice
Practice 1
1. Solve Exercise 1 Page 66 SGK Mathematics Grade 3
Problem: Complete the following table:
Solution Guide: Read the numbers (or write the numbers) in order from ten thousand, thousand, hundred, ten, one.
Answer:
2. Solve Exercise 2 Page 66 SGK Mathematics Grade 3
Problem: Number?
Solution Guide:
a) Counting on an additional 10 units starting from number 67,210 and fill in the missing numbers.
b) Counting on an additional 100 units starting from number 46,600 and fill in the missing numbers.
c) Counting on an additional 1000 units starting from number 79,000 and fill in the missing numbers.
Answer:
3. Solve Exercise 3 Page 66 SGK Mathematics Grade 3
Problem: The distance from the position of the golden bee to the flower gardens is given as follows:
Which flower garden is farthest from the position of the golden bee? Which flower garden is closest?
Solution Guide:
+ Observe the image, determine the distance from the bee to each flower garden.
+ Compare the distances from the position of the golden bee to the flower gardens and answer according to the requirements of the problem.
Answer:
Observing the image above, we see:
The distance from the bee to the rose garden is 42,890 meters.
The distance from the bee to the daisy garden is 45,050 meters.
The distance from the bee to the orchid garden is 35,000 meters.
The distance from the bee to the tulip garden is 25,090 meters.
So the distance from the position of the golden bee to the sunflower garden is the farthest; from the position of the golden bee to the daisy garden is the closest.
So the farthest distance from the position of the golden bee is to the sunflower garden; the closest distance from the position of the golden bee is to the daisy garden.
4. Solve Exercise 4 Page 67 Math 3 Workbook
Problem: D, S?
Solution Guide:
- Mentally calculate the result of each calculation.
- Compare the numbers or results on both sides, if correct write D, if wrong write S.
Answer:
- See more: Solve exercises on pages 70, 71, 72 of Math 3 Workbook, Connect Knowledge with Life book
Practice 2
1. Solve Exercise 1 Page 67 Math 3 Workbook
Problem: What number is displayed on the last train car?
Solution Guide: Count on an additional 10,000 units starting from number 50,000 and record the missing numbers on the remaining train cars.
Answer:
So the last train car displays the number 100,000.
Problem: Which car wash should each car go to?
Solution Guide: Calculate the value of the expression at each car wash and connect it to the corresponding car with the number indicated.
Answer:
The car should go to the car wash marked with the expression equal to the number on that car.
Problem: Who rounded the number correctly?
Solution Guide: When rounding the number to the nearest thousand, we compare the hundreds digit to 5. If the hundreds digit is less than 5, round down; otherwise, round up.
Answer: Nam rounded the number correctly.
When rounding to the nearest thousand, if the hundreds digit is less than 5, round down; otherwise, round up.
The answer is: 74,381 has the hundreds digit of 3. Since 3 is less than 5, we round down. Therefore, rounding 74,381 to the nearest thousand gives us 74,000. So, Viet is correct.
Solve Problem 4 on Page 68 of the Math Textbook for Grade 3.
Question: Each of you write one of the numbers 20,080; 52,080; 92,000 on the board.
Which number did each of you write?
Step-by-step guide: By analyzing the dialogue between the two friends and the given numbers to answer the question.
Answer:
Among the numbers 20,080, 52,080, and 92,000:
+ The numbers 52,080 and 92,000 share the same thousands digit.
+ The numbers 52,080 and 20,080 share the same tens digit.
Hence, Mai wrote 52,080, the first male friend wrote 92,000, and the second male friend wrote 20,080.
Practice 2
1. Solve Exercise 1 Page 68 Math Textbook Grade 3
Prompt: Observe the image and select the correct answer.
Which position holds the largest number?
A. Inside the circle and inside the square.
B. Inside the square but outside the circle.
C. Inside the circle but outside the square.
Solution Guide: Compare the five-digit numbers and then choose the appropriate answer.
Answer:
2. Solve Exercise 2 Page 68 Math Textbook Grade 3
Problem:
a) Based on the number of bees, choose the correct answer:
Round to the nearest thousand, the bee colony has about:
A. 26,000 bees B. 27,000 bees C. 25,000 bees
b) Round the number of bees to the nearest hundred, to the nearest ten thousand.
Solution Guide:
a) When rounding up to the nearest thousand, compare the hundreds digit to 5. If the hundreds digit is less than 5, round down; otherwise, round up.
b) - When rounding up to the nearest hundred, compare the tens digit to 5. If the tens digit is less than 5, round down; otherwise, round up.
- When rounding up to the nearest ten thousand, compare the thousands digit to 5. If the thousands digit is less than 5, round down; otherwise, round up.
Answer:
a) Rounding to the nearest thousand, the bee colony has about 27,000 bees.
Thus, we choose answer B.
b) Rounding to the nearest hundred, the bee colony has about 26,800 bees.
Rounding to the nearest ten thousand, the bee colony has about 30,000 bees.
With detailed solutions in the exercise solution document pages 66, 67, 68 of Math 3 Textbook Volume 2, Connect Knowledge with Life book, hopefully students and parents have been able to imagine the process, guide their children to solve the exercises accurately, and understand the lesson better.
