Solve Exercise 2 on Page 42 of Math 4 Textbook

Buzz

Ngày cập nhật gần nhất: 15/4/2026

Solve Exercise 2 on Page 42 of Math 4 Textbook: Evaluate the expression a - b where:

Guidance to Solve Exercise 2 on Page 42 of Math 4 Textbook

Problem:
a - b is an expression with two variables. Find the value of a - b for the following cases:
a) a = 32 and b = 20;
b) a = 45 and b = 36;
c) a = 16 m and b = 10 m.

Solution Method:
To obtain the correct result, simply substitute the given values of a and b into the expression a - b and perform the calculation carefully.

Answer:
a) Substitute values: a = 32 and b = 20, we get a - b = 32 - 20 = 12
b) Substitute values: a = 45 and b = 36, we get a - b = 45 - 36 = 9
c) Substitute values: a = 16 m and b = 10 m, we get a - b = 16m - 10m = 6 m

Here is the solution for Exercise 2 on Page 42 of Math 4 Textbook. Additionally, there are 3 more exercises in this section: Solve Exercise 1 on Page 42 Math 4, Solve Exercise 3 on Page 42 Math 4, Solve Exercise 4 on Page 42 Math 4. Explore the guidance on solving exercises on page 42 Math 4 to excel in 4th-grade Math!

Frequently Asked Questions

What is the method for solving the expression a - b?

To solve the expression a - b, substitute the values of a and b into the expression and perform the subtraction. For example, if a = 32 and b = 20, then a - b equals 32 - 20, which results in 12. This method applies to any given values for a and b.

How do you evaluate a - b for different variable values?

To evaluate a - b for different values, simply replace a and b with the given numbers. For instance, if a = 45 and b = 36, then a - b would be calculated as 45 - 36, resulting in 9. The process is the same regardless of the values used.

Can you explain the results for the expression a - b with specific values?

For the expression a - b, when a = 16 m and b = 10 m, the result is 16 m - 10 m, which equals 6 m. This demonstrates how to handle variables with units and perform the subtraction accordingly to find the difference.

Mytour's content is for customer care and travel encouragement only, and we are not responsible.

For errors or inappropriate content, please contact us at: [email protected]