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Guide to solving 4th-grade math on page 175, reviewing finding two numbers when knowing their sum and difference (Includes solution methods).
1. Solving math on page 175, exercises 1: Reviewing finding two numbers when knowing their sum and difference
Problem:
Fill in the blanks with the appropriate numbers:
Answer:
2. Solving 4th-grade math on page 175, exercise 2: Reviewing finding two numbers when knowing their sum and difference
Problem:
Two teams planted a total of 1375 trees. The first team planted 286 more trees than the second team. How many trees did each team plant?
- Illustrate the problem with a diagram
Answer:
3. Solving 4th-grade math: Reviewing finding two numbers when knowing their sum and difference on page 175, exercise 3 in the textbook
Problem:
A rectangular plot of land has a perimeter of 530 meters, with the width being 47 meters less than the length. Calculate the area of the plot.
- Calculate the sum of the lengths of the two sides of the rectangle = Perimeter of the rectangle/2.
- Illustrate the problem with a diagram.
4. Solving 4th-grade math on page 175, exercise 4 from the textbook: Reviewing finding two numbers when knowing their sum and difference
Problem:
The average of two numbers is 135. Knowing one of the numbers is 246. Find the other number.
- Calculate the sum of the two numbers = Average of the two numbers x 2.
Answer:
The sum of the two numbers is:
135 x 2 = 270
The number to find is:
270 - 246 = 24
Result: 24.
5. Solving 4th-grade math on page 175, exercise 5 from the textbook: Reviewing finding two numbers when knowing their sum and difference
Problem:
Find two numbers knowing their sum is the largest three-digit number and their difference is the largest two-digit number.
- Logical thinking: The sum of two numbers equal to the largest three-digit number = 999; the difference of two numbers equal to the largest two-digit number = 99.
