Solving Exercise 1 on Pages 123, 124 of Math Textbook Grade 4

Buzz

Ngày cập nhật gần nhất: 15/4/2026

Solving Exercise 1 on Pages 123, 124 of Math Textbook Grade 4 in Focused Practice, Finding the suitable digit

Guidelines for Solving Exercise 1 on Pages 123, 124 of Math Textbook Grade 4

Problem Statement: Find the suitable digit to fill in the asterisk for: a) 75... divisible by 2 but not divisible by 5. c) 75... divisible by 2 and divisible by 5. Is the number found divisible by 3? c) 75... divisible by 9 Is the number found divisible by 2 and 3?

To solve: - A number divisible by 5 has a units digit of 0 or 5. - A number divisible by both 2 and 5 has a units digit of 0. - A number divisible by 3 has a digit sum divisible by 3. - A number divisible by 9 has a digit sum divisible by 9. - A number divisible by both 2 and 3 must satisfy: Digit sum divisible by 3 and units digit is 0, 2, 4, 6, or 8.

Answers: a) Fill in the blank with one of these digits: 2, 4, 6, 8, hence: 752, 754, 756, 758. b) For a number divisible by 2 and 5, the units digit must be 0. So, fill in the blank with 0: 750. We have: 7 + 5 + 0 = 12; 12 is divisible by 3. So, 750 is divisible by 3. c) For a number 75... divisible by 9, 7 + 5 + ... must be divisible by 9, or 12 + ... must be divisible by 9. Fill in the blank with 6: 756. The units digit of 756 is 6, hence divisible by 2, and the digit sum is 18, divisible by 3. So, 756 is divisible by both 2 and 3.

Mytour just guided through solving exercise 1 on page 123, 124 of the Math 4 textbook. Additionally, we have exercises: Solve Exercise 2 on page 123, 124 of Math 4 textbook, Solve Exercise 3 on page 123, 124 of Math 4 textbook, Solve Exercise 4 on page 123, 124 of Math 4 textbook, and Solve Exercise 5 on page 123, 124 of Math 4 textbook, all with suggested methods. Check out the solution for class 4 math page 123, 124 to excel in 4th-grade math!

Frequently Asked Questions

What steps should I follow to solve Exercise 1 on pages 123 and 124?

To solve Exercise 1, identify suitable digits for 75... that make the number divisible by 2, 3, 5, and 9, following specific rules for digit sums and units digits.

How do I determine if a number is divisible by 2 or 5?

A number is divisible by 2 if its last digit is even (0, 2, 4, 6, 8). For 5, the last digit must be 0 or 5. Apply these rules when solving the exercise.

What digits can fill the blank in 75... to make it divisible by 9?

To make 75... divisible by 9, the sum of the digits must equal a multiple of 9. For 756, fill the blank with 6, since 7 + 5 + 6 equals 18, which is divisible by 9.

Is the number 750 divisible by both 2 and 3?

Yes, the number 750 is divisible by 2 since it ends in 0, and its digit sum (7 + 5 + 0 = 12) is divisible by 3, confirming divisibility by both numbers.

Where can I find more exercises related to this math topic?

You can find additional exercises for practice in the Math 4 textbook, including Exercises 2 through 5 on pages 123 and 124, with suggested solutions available.

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]