Practice the questions of McGraw Hill Math Grade 4 Answer Key PDF Chapter 2 Lesson 1 Addition Properties to secure good marks & knowledge in the exams.
McGraw-Hill Math Grade 4 Answer Key Chapter 2 Lesson 1 Addition Properties
Complete and Identify
Complete each number sentence. Then identify the addition property shown in each number sentence.
Question 1.
(8 + 17) + 23 = 8 + (17 + 23)
Associative Property of Addition
Answer:
(8 + 17) + 23 = 8 + (17 + 23) = 48.
Associative Property of Addition.
Explanation:
(8 + 17) + 23 = 8 + (17 + 23)
= 8 + 40
= 48.
Question 2.
899 + ___ = 899
Answer:
899 + 0 = 899.
Identity property of addition..
Explanation:
899 + ?? = 899
=> ?? = 899 – 899
=> ?? = 0.
Question 3.
45 + 31 = 31 + ___
Answer:
45 + 31 = 31 + 45.
Identity property of addition.
Explanation:
45 + 31 = 31 + ??
=> 76 – 31 = ??
=> 45 = ??
Question 4.
14 + 6 = ___ + 14
Answer:
14 + 6 = 6 + 14.
Identity property of addition.
Explanation:
14 + 6 = ?? + 14
=> 20 = ?? + 14
=> 20 – 14 = ??
=> 6 = ??.
Question 5.
(24 + 12) + 8 = ___ + (12 + 8)
Answer:
(24 + 12) + 8 = 24 + (12 + 8)
Associative property of addition.
Explanation:
(24 + 12) + 8 = ?? + (12 + 8)
=> 36 + 8 = ?? + (12 + 8)
=> 44 = ?? + 20
=> 44 – 20 = ??
=> 24 = ??.
Question 6.
(23 + 0) + 42 = ___ + 42
Answer:
(23 + 0) + 42 = (23 + 0) + 42.
Associative property of addition.
Explanation:
(23 + 0) + 42 = ?? + 42.
=> (23 + 0) + 42 – 42 = ??
=> (23 + 0) = ??
Question 7.
Pedro says that when zero is added to a number, the sum is always zero. Is he correct? Why or why not?
Answer:
No, Pedro is incorrect because zero added to any number, result is the number itself.
Explanation:
When zero is added to a number, the sum is always not a zero because zero added to any number, result is the number itself.
2 + 0 = 2.