Solving exercises on page 89 of Math 3 Textbook Volume 2, Cánh Diều

Solving Math Grade 3 page 89 Cánh Diều book volume 2

Solving exercises on page 89 of Math 3 Textbook Volume 2, Cánh Diều:

Area of rectangles. Area of squares

1. Solve Exercise 1 Page 89 Math Grade 3 Textbook

Problem Statement: Calculate the area of each rectangle below:

Solution Guide: To find the area of a rectangle, multiply its length by its width (using the same unit of measurement).

Answer:
a) The area of the purple rectangle is:
                 3 x 5 = 15 (cm²)
b) The area of the orange rectangle is:
                 8 x 4 = 32 (cm²)

2. Solve Exercise 2 Page 89 Math Grade 3 Textbook

Problem Statement: Calculate the area of each square below:

Solution Guide: To find the area of a square, multiply the length of one side by itself.

Solution:
The area of the green square is:
               5 x 5 = 25 (cm²)
The area of the blue square is:
                   4 x 4 = 16 (cm²)

3. Solve Exercise 3 Page 89 Math Grade 3 Textbook

Problem: a) Calculate the area of the library card:

b) Calculate the area of the postage stamp:

Solution Guide:
To find the area of a rectangle, multiply its length by its width (using the same unit of measurement).
To find the area of a square, multiply the length of one side by itself.

Answer:
a) The area of the library card is:
               9 x 6 = 54 (cm²)
b) The area of the postage stamp is:
               3 x 3 = 9 (cm²)
                         Answer: a) 54 cm²
                                       b) 9 cm²

With the solution document on page 89 of Math 3 Volume 2 textbook, The Kite book, you must have understood the method for each exercise. You can review the theory taught in class before starting the exercises to understand and grasp the knowledge better.