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Unlock the secrets of 4th-grade math on page 7 in VBT exercise book 2, Practice session, question 89. This guide provides detailed solutions for exercises 1, 2, 3, 4, following the textbook program. In addition to working on exercises in the textbook, students can practice these additional exercises to reinforce their knowledge and apply divisibility rules for 3 and 9 in their solutions.Explore 4th-grade math, page 7 in VBT exercise book 2, Practice session, question 89
1. Solve question 1 - Math exercise book for 4th grade, exercise 2, page 7
Problem:Continue writing in the blanks:In the numbers 294; 634; 2763; 6020; 33,319; 78,132.a) Numbers divisible by 3 are: ..........b) Numbers not divisible by 3 are: ..............c) Numbers divisible by 3 but not by 9 are: ................Solution Method*) Calculate the sum of the given digits:- Numbers with a digit sum divisible by 3 are divisible by 3.- Numbers with a digit sum divisible by 9 are divisible by 9.AnswerCalculate the sum of digits for the given numbers:The number 294 has a digit sum of 15 ;The number 634 has a digit sum of 13 ;The number 2763 has a digit sum of 18 ;The number 3681 has a digit sum of 18 ;The number 6020 has a digit sum of 8 ;The number 33,319 has a digit sum of 22 ;The number 78,132 has a digit sum of 21.Therefore :a) Numbers divisible by 3 are: 294; 2763; 3681; 78,132.b) Numbers not divisible by 3 are: 634; 6020; 33,319.c) Numbers divisible by 3 but not by 9 are: 294; 78,1322. Solve question 2 - Math exercise book for 4th grade, exercise 2, page 7
Problem:
Mark D for correct, mark I for incorrect:
Solution MethodApply divisibility rules for 2 ; 9 ; 3 :
Numbers ending in 0, 2, 4, 6, 8 are divisible by 2.
Numbers whose digit sum is divisible by 3 are also divisible by 3.
Numbers whose digit sum is divisible by 9 are also divisible by 9.
Answer3. Solve question 3 - Math exercise book for 4th grade, exercise 2, page 7
Problem:
Fill in the blank with the appropriate number to make:
Solution Method
Apply divisibility rules for 2 ; 9 ; 3 :
- Numbers with a last digit of 0, 2, 4, 6, 8 are divisible by 2.
- Numbers whose digit sum is divisible by 3 are also divisible by 3.
- Numbers whose digit sum is divisible by 9 are also divisible by 9.
Answer
4. Solve question 4 - Math exercise book for 4th grade, exercise 2, page 7
Problem:
For three out of four digits 0; 6; 1; 2, write the three-digit numbers that:
a) Divisible by 9:
b) Divisible by 3 but not by 9:
Solution Method
- Numbers whose digit sum is divisible by 3 are also divisible by 3.
- Numbers with a digit sum divisible by 9 are also divisible by 9.
Answer
a) For 3 out of four digits 0 ; 6 ; 1 ; 2, write the three-digit numbers divisible by 9:
612; 621; 126; 162; 261; 216.
b) For 3 out of four digits 0 ; 6 ; 1 ; 2, write the three-digit numbers divisible by 3 but not by 9: 600; 120; 210; 201; 102; 660; 111; 300; 633; 336; 363; 222
5. Solve question 5 - Math exercise book for 4th grade, exercise 2, page 7
Problem:
a) Continue writing five numbers divisible by 10: 0; 10; 20; 30; 40; 50; 60; 70
b) Continue writing three numbers divisible by both 2, 5, and 3: 0; 30; 60; 90; 120
Method of Solution
- Numbers with a last digit of 0 are divisible by both 2 and 5.
- Numbers whose digit sum is divisible by 3 are also divisible by 3.
Answer
a) Continue writing five numbers divisible by 10:
0; 10; 20; 30; 40; 50; 60; 70
b) Continue writing three numbers divisible by both 2, 5, and 3:
0; 30; 60; 90; 120
Above is the guidance for solving Math Exercise Book for 4th Grade Exercise 2 Page 7 Practice, Question 89. Invite readers to continue with the guidance on Solving 4th-grade math, page 8 VBT exercise book 2 Focus practice, question 90 or check out the solution for Solving 4th-grade math, page 6 VBT exercise book 2, Divisibility rules for 3, question 88 to reinforce knowledge.
