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Solving Math Grade 3, Horizon of Creativity Workbook Volume 2
Solving exercises on pages 16, 17 of Math Grade 3 Workbook Volume 2, 'Horizon of Creativity'
Subtracting numbers within the range of 10,000
Practice
1. Solve Exercise 1 on Page 16 of Math Grade 3 Workbook
Problem: Set up and solve the following calculation.
Solution Guide:
Write the subtraction vertically so that digits in the same column align with each other.
Subtract the numbers from right to left.
Answer:
Practice
1. Solve Exercise 1 on Page 17 of Math Grade 3 Workbook
Problem: Number?
Solution Guide:
Difference = minuend - subtrahend.
Minuend = difference + subtrahend.
Answer:
2. Solve Exercise 2 on Page 17 of Math Grade 3 Workbook
Problem: Select the appropriate value for each expression.
Solution Guide: Calculate the value of each expression and then combine the expression with its corresponding result.
Answer:
We have:
4 857 - 657 = 4 200
2 819 - 1 411 = 1 408
5 918 - 3 865 = 2 053
6 231 - 3 904 = 2 327
We combine as follows:
3. Solve Exercise 3 on Page 17 of Math Grade 3 Workbook
Problem: This year, Mrs. Tu harvested 5,193 red roses and 3,463 yellow roses. How many more red roses did Mrs. Tu harvest than yellow roses?
Solution Guide: To find out how many more red roses Mrs. Tu harvested than yellow roses, we subtract the number of yellow roses from the number of red roses.
Answer:
The number of red roses Mrs. Tu harvested more than the number of yellow roses is:
5,193 - 3,463 = 1,730 (roses)
Answer: 1,730 flowers.
- See more: Solving exercises on pages 18, 19 of Math 3 Workbook Volume 2, from the book 'Horizon of Creativity'
4. Solve Exercise 4 on Page 17 of Math Grade 3 Workbook
Problem: Number?
Given:
- The length of the fold line ABCD is 1,200 mm.
- The length of the fold line ABC is 900 mm.
- The length of the fold line BCD is 700 mm.
The length of line segment BC is .?. mm.
Solution Guide:
- Step 1: Calculate the length of line segment AB = Length of fold line ABCD - Length of fold line BCD.
- Step 2: Calculate the length of line segment BC = Length of fold line ABC - Length of line segment AB.
Answer:
The length of line segment AB is:
1,200 - 700 = 500 (mm)
The length of line segment BC is:
900 - 500 = 400 (mm)
Answer: 40 mm.
Solving exercises on pages 16, 17 of Math 3 Workbook Volume 2, from the book 'Horizon of Creativity' provides detailed solution guidance. We hope students can reinforce their knowledge effectively and grasp the lesson well.
