Buzz
Solving 4th-grade math puzzles on pages 23, 24, 25 of the Kite Wings Book 1, Comparing multi-digit numbers focuses on practicing even and odd numbers. From the answer hints, Mytour will guide students on quickly determining the place value of each digit, accurately reading numbers with up to three digits.
Refer to other Grade 4 Math solving materials:
- Grade 4 Math Kite Wings Book
Solving Grade 4 Math Kite Wings Book 1, pages 28, 29, 30
Exercise 11: Practice
1. Solve Exercise 1 - Kite Wings Grade 4 Book 1 page 28
Problem Statement:
Perform (as shown in the example):
Solution Method:
- Determine the place value of each digit in every number and fill in the table.
- When reading numbers with multiple digits, separate them into groups, from units to thousands and then millions. Then, based on the way numbers with up to three digits are read in each group, read and pronounce them from left to right.
Answer:
2. Solve Exercise 2 - Kite Wings Grade 4 Book 1 page 28
Problem Statement:
Write the following numbers and indicate how many digits each number has, how many zeros each number has:
Thirty-nine thousand, Six hundred thousand, Eighty-five million, Twenty million, Seven hundred million
Solution Method:
Based on the way numbers with up to 3 digits are written in each class, write from millions class, thousands class, to units class.
Answer:
Thirty-nine thousand: 39,000. The number 39,000 has 5 digits and has 3 zeros.
Six hundred thousand: 600,000. The number 600,000 has 6 digits and has 5 zeros.
Eighty-five million: 85,000,000. The number 85,000,000 has 8 digits and has 6 zeros.
Twenty million: 20,000,000. The number 20,000,000 has 8 digits and has 7 zeros.
Seven hundred million: 700,000,000. The number 700,000,000 has 9 digits and has 8 zeros.
3. Solve Problem 3 - Kite Wings Grade 4 Book 1 Page 29
Problem Statement:
Even numbers, odd numbers
- A number divisible by 2 is an even number.
For example: 0, 2, 4, 6, 8, .., 156, 158, 160, ... are even numbers.
Note: A number divisible by 2 is a number that is divided by 2 without remainder.
- A number not divisible by 2 is an odd number.
For example: 1, 3, 5, 7, 9, ... 567, 569, 571, ... are odd numbers.
Note: A number not divisible by 2 has a remainder of 1 when divided by 2.
a) Among the numbers 41, 42, 43, 100, 3,015, 60,868, which one is even? Which one is odd?
b) Observations about the last digits in odd numbers, even numbers in question a.
c) Read the following information and provide an illustrative example:
- Numbers with last digits 0, 2, 4, 6, 8 are divisible by 2.
- Numbers with last digits 1, 3, 5, 7, 9 are not divisible by 2.
Solution Method:
Based on the knowledge:
- Even numbers are divisible by 2.
- Odd numbers are not divisible by 2.
Answer:
a) Even numbers: 42, 100, 60,868.
Odd numbers: 41, 43, 3,015
b) The last digits in even numbers from the previous question are: 0, 2, 8
The last digits in odd numbers from the previous question are: 1, 3, 5
c) Numbers divisible by 2 are 24, 40, 42, 64, 76, 88, 90
Numbers not divisible by 2 are 21, 43, 45, 67, 79
4. Solve Exercise 4 - Kite Wings Grade 4 Book 1 page 29
Problem Statement:
a) State a suitable even number for each blank:
280, 282, 284, ..., ..., 290
b) State a suitable odd number for each blank:
8,167, 8,169, 8,171, ..., ..., 8,177
Solution Method:
Add 2 units and fill in the blanks with appropriate numbers.
Answer:
a) Suitable even numbers are: 286, 288
b) Suitable odd numbers are: 8,173, 8,175
Behold the challenge from the realm of kites, Class 4, Page 29.
The Riddle Awaits:
Pen down a four-digit marvel, then dare to decipher its parity.
Unveiling the Method:
Drawing upon knowledge:
- A number divisible by 2 is even.
- A number not divisible by 2 is odd.
The Answer:
For instance:
Friend A: Guess if 2,024 is even or odd.
Friend B answers: 2,024 is even.
6. Solve problem 6 - Kite Class Grade 4 Exercise 1 Page 30
The Challenge:
Guide the lost kitten to find the lost ball of yarn by following the path marked with even numbers:
The Solution Approach:
- Numbers ending in 0, 2, 4, 6, 8 are even numbers.
- Numbers ending in 1, 3, 5, 7, 9 are odd numbers.
The Answer:
7. Solve problem 7 - Kite Class Grade 4 Exercise 1 Page 30
The Challenge:
The table below reveals population data for certain provinces and cities in our country in 2020:
a) Read the population numbers of those provinces and cities in ascending order.
b) Round off the population numbers of those provinces and cities to the nearest hundred thousand.
The Solution Approach:
a) Read the population numbers of those provinces and cities in ascending order.
b) Round off the population numbers of those provinces and cities to the nearest hundred thousand.
The Answer:
a) Arrange provinces and cities in order of increasing population: Da Nang, Quang Ninh, Thai Binh, Binh Duong.
Read the population numbers of those provinces and cities in ascending order:
One million one hundred sixty-nine thousand five hundred; one million three hundred thirty-seven thousand six hundred; one million eight hundred seventy thousand two hundred; two million five hundred eighty thousand six hundred.
b) Round off the population numbers of those provinces and cities to the nearest hundred thousand.
Rounding off the population of Thai Binh province to the nearest hundred thousand gives 1,900,000.
Rounding off the population of Da Nang province to the nearest hundred thousand gives 1,200,000.
Rounding off the population of Binh Duong province to the nearest hundred thousand gives 2,600,000.
Rounding off the population of Quang Ninh province to the nearest hundred thousand gives 1,300,000.
8. Solve problem 8 - Kite Class Grade 4 Exercise 1 Page 30
The Challenge:
Explore the prices of items ranging from a million dong to tens of millions and hundreds of millions, then record them.
For Example:
- A desktop computer costs around 8 million dong.
- A refrigerator costs around 23 million dong.
- A car costs around 750 million dong.
The Solution Approach:
Investigate the prices of some items worth from million dong to tens of million and hundred million dong, then record them.
The Answer:
A motorcycle costs around 40 million dong.
A television costs around 25 million dong.
A mobile phone costs around 15 million dong.
Welcome to the tutorial for solving 4th-grade math problems on pages 28, 29, and 30 of Kite Workbook, exercise 11. If you need to revisit solving problems from pages 26 and 27 of Kite Workbook 1 - Exercise 10, rounding numbers to the nearest hundred thousand, or preview instructions from pages 31 and 32 of Kite Workbook 1 - Exercise 12, Natural Numbers Sequence, to gain deeper insight into the lesson.
Wishing all of you great success in your math studies.
