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Step-by-step solutions for exercises 1, 2, 3... in the lesson on Commutative and Associative Properties of Addition in the Connect Knowledge textbook. Students are invited to refer to grasp the methods clearly.
Additional resources for Grade 4 Mathematics: - Solve Grade 4 Connect Knowledge textbook - Solve Grade 4 page 30 CTST textbook Volume 1 - Exercise 13: Commutative property, Associative property of Addition
Solving math Grade 4 pages 83, 84, 85 Connect Knowledge Textbook
Lesson 24: Commutative and Associative Properties of Addition
Solving Math Grade 4 Volume 1 SGK, KNTT textbook: Activity on page 83
Solving Exercise 1, page 83 Grade 4 Math Volume 1 Connect Knowledge Textbook
Problem: Number?
Solution:
Solving Exercise 2, page 83 Grade 4 Math Volume 1 Connect Knowledge Textbook
Problem: Robot uses segments of lengths a, b, c to assemble bars as shown below. Which bars have equal lengths?
Solution:
Solving Exercise 3, page 83 Grade 4 Math Volume 1 Connect Knowledge Textbook
Problem: Calculate in the most convenient way (following the pattern).
Pattern: 30 + 89 + 70 = 30 + 70 + 89
= 100 + 89 = 189
a) 30 + 192 + 70
b) 50 + 794 + 50
c) 75 + 219 + 25
d) 725 + 199 + 125
Solution:
Grade 4 Math Workbook, Connect Knowledge Textbook: Activity on Page 85
Exercise 1, Page 85 Grade 4 Math Workbook Connect Knowledge Textbook
Problem: Compute conveniently
a) 68 + 207 + 3
b) 25 + 159 + 75
c) 1 + 99 + 340
d) 372 + 290 + 10 + 28
Solution:
Solving Exercise 2, Page 85 Grade 4 Math Volume 1 Connect Knowledge Textbook
Problem: Calculate the value of the expression (a + b) + c with a = 1,975; b = 1,991; c = 2,025.
Solution:
Solving Math for Grade 4, Volume 1 SGK, KNTT Textbook: Practice on Page 85
Solving Exercise 1, Page 85 Grade 4 Math Volume 1 Connect Knowledge Textbook
Problem: Find the appropriate number or letter for ..?..
a) 746 + ..?.. = 487 + 746
b) Solve for ..?..: ..?.. = 1 975 - 304
c) Solve for ..?..: ..?.. = b
d) Solve for ..?..: ..?.. = c + 74
Solution:
b) Calculate: 12 + 14 + 16 + 18
b) Calculate: 92 + 74 + 26
c) Calculate: 92 + 74 + 26
d) Calculate: 12 + 14 + 16 + 18
c) 592 + 99 + 208
d) 60 + 187 + 40 + 13
Solution:
Solving Exercise 3, page 85 Grade 4 Math Volume 1 Connect Knowledge Textbook
Solution:
Here is the solution to Grade 4 Mathematics KNTT page 83, 84, 85 Exercise 1 Associative and Commutative Properties of Addition. You can also refer to Solution to Grade 4 Mathematics page 87 Exercise 1 KNTT Workbook - Problem 25: Find two numbers given their sum and difference, or review Solution to Grade 4 Mathematics page 80, 81 Exercise 1 KNTT Workbook - Problem 23: Subtraction of numbers with multiple digits to reinforce knowledge.
