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Solve Math 3 exercises on pages 52-53 Workbook Volume 1, Cánh Diều book
Solve exercises on pages 52-53 Math 3 Workbook Volume 1, Cánh Diều book
Practice
1. Solve exercise 1 Page 52 Math 3 Workbook
Problem: Calculate mentally:
3 : 3 12 : 3 72 : 9
8 : 4 5 : 5 48 : 6
14 : 7 7 : 7 8 : 8
Guidance: Use division tables to calculate.
Answer:
3 : 3 = 1 12 : 3 = 4 72 : 9 = 8
8 : 4 = 2 5 : 5 = 1 48 : 6 = 8
14 : 7 = 2 7 : 7 = 1 8 : 8 = 1
Observation: Calculations resulting in 1 are: 3 : 3; 5 : 5; 7 : 7; 8 : 8.
2. Solve exercise 2 Page 52 Math 3 Workbook
Problem:
a) Calculate mentally:
4 : 1 7 : 1 5 : 1 1 : 1
b) Give a similar example as in part a and share it with a friend.
Guidance: Any number divided by 1 will result in the same number.
Answer:
a) 4 : 1 = 4 7 : 1 = 7 5 : 1 = 5 1 : 1 = 1
b) Students come up with their own examples.
3. Solve exercise 3 on Page 53 of Math Grade 3 Workbook
a) Students read the content and discuss. b) Mental calculations: 0 ÷ 7 = 0, 0 ÷ 5 = 0, 0 ÷ 10 = 0; 0 ÷ 9 = 0, 0 ÷ 4 = 0, 0 ÷ 1 = 0. c) Find the incorrect operations and correct them: 8 ÷ 8 = 1, 0 × 2 = 0, 3 × 0 = 0; 8 ÷ 1 = 8, 2 ÷ 0 = Undefined, 3 ÷ 0 = Undefined.
Guidance for solving: Dividing 0 by any number other than 0 equals 0. There is no division by 0.
Answer: a) Students discuss on their own. b) 0 ÷ 7 = 0, 0 ÷ 5 = 0, 0 ÷ 10 = 0, 0 ÷ 9 = 0, 0 ÷ 4 = 0, 0 ÷ 1 = 0 c) Operation 8 ÷ 1 = 1 is incorrect. Correct it to 8 ÷ 1 = 8. Operation 2 ÷ 0 = 0 is incorrect. Correct it to 0 ÷ 2 = 0. Operation 3 ÷ 0 = 0 is incorrect. Correct it to 0 ÷ 3 = 0.
4. Solve exercise 4 on Page 53 of Math Grade 3 Workbook
Task: Look at the picture and describe a situation involving division.
Answer: Students look at the picture and describe a situation involving division. Example: There are 12 pumpkins. Distribute 12 pumpkins equally into 6 baskets. Then, each basket has 12 ÷ 6 = 2 pumpkins.
In addition to solving exercises on pages 52 and 53 of Math Grade 3 Workbook, Cánh Diều book, students can reinforce their knowledge by doing more related division exercises and reviewing previously learned theory.
