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Solving Grade 3 Math exercises on pages 44, 45, and 46 of Workbook Volume 2
Solving exercises on pages 44, 45, and 46 of Math 3 Workbook Volume 2, the book of Knowledge Connection with real-life connections
Multiplying a four-digit number by a single-digit number
Activity
1. Solve Exercise 1 Page 44 Math Grade 3 Workbook
Problem: Calculate.
Guidance: Multiply the second factor by each digit of the first factor from right to left.
Answer:
2. Solve Exercise 2 Page 44 Math Grade 3 Workbook
Problem: Set up the calculation and then solve.
Instructions: Arrange the multiplication vertically so that the digits in the same row align with each other.
- Perform multiplication sequentially from right to left.
Answer:
3. Solve Exercise 3 Page 44 Math Grade 3 Workbook
Problem: Calculate mentally (according to the example).
a) 4,000 x 2 b) 3,000 x 3 c) 2,000 x 4
Guidance: Observe the example to mentally calculate multiplying numbers rounded to thousands.
Answer:
a) 4 thousand x 2 = 8 thousand
4,000 x 2 = 8,000
b) 3 thousand x 3 = 9 thousand
3,000 x 3 = 9,000
c) 2 thousand x 4 = 8 thousand
2,000 x 4 = 8,000
4. Solve Exercise 4 Page 44 Math Grade 3 Workbook
Problem: A square-shaped piece of land has a side length of 1,617 m. What is the perimeter of that piece of land in meters?
Guidance: Perimeter of a square = side length multiplied by 4.
Answer:
The perimeter of that piece of land is:
1,617 x 4 = 6,468 (m)
Answer: 6,468 m.
Practice 1
1. Solve Exercise 1 Page 44 Math Grade 3 Workbook
Problem: Calculate.
Guidance: Multiply the second factor by each digit of the first factor from right to left.
Answer:
2. Solve Exercise 2 Page 45 Math Grade 3 Workbook
Problem: Set up the calculation and then solve.
Guidance:
- Arrange the multiplication vertically so that the digits in the same row align.
- Perform multiplication sequentially from right to left.
Answer:
3. Solve Exercise 3 Page 45 Math Grade 3 Workbook
Problem: Number?
Guidance: Calculate from left to right and then fill in the blank with the result.
Answer:
4. Solve Exercise 4 Page 45 Math Grade 3 Workbook
Problem: Number?
Guidance: The number of liters of oil needed for 3 fishing boats = Number of liters of oil needed for 1 fishing boat x 3.
Answer:
- More: Solve exercises on pages 48, 50, 51 of Math Grade 3 Workbook, Connecting Knowledge with Life
Practice 2
1. Solve Exercise 1 Page 45 Math Grade 3 Workbook
Problem: Set up and solve.
Solution:
- Arrange the multiplication vertically so that the digits in the same column are aligned.
- Perform multiplication from right to left.
Answer:
2. Solve Exercise 2 Page 46 Math Grade 3 Workbook
Problem: A division consists of 4 regiments, each regiment has 1,300 soldiers. Then, the division is supplemented with an additional 450 soldiers. How many soldiers does the division have now?
Guidance:
Step 1: Calculate the number of people in 4 regiments = Number of people in each regiment x 4
Step 2: The number of people in the division = number of people in 4 regiments + number of people supplemented.
Answer:
4 regiments have the number of people:
1,300 x 4 = 5,200 (people)
The entire division has the total number of people:
5,200 + 450 = 5,650 (people)
Answer: 5,650 people.
3. Solve Exercise 3 Page 46 Math Grade 3 Workbook
Problem: Number?
Cats and turtles compete in strength.
Problem: Find the suitable digits.
Instructions: Apply the rules of placing values, mentally calculate, and find the appropriate digit for the '?' in each box.
Answer:
Referencing the exercise solution on pages 44, 45, 46 of Math Workbook Grade 3 Volume 2, Connect Knowledge to Life series, we hope students can successfully complete the exercises, grasp the knowledge of the lesson Multiplying Four-Digit Numbers by Single-Digit Numbers.
