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Relate Addition and Subtraction

This topic deals with the concept of relation between addition and subtraction. We learn to write Fact Families and complete Fact Triangles along with some problem solving applications.
Practice Question
1

Write a fact family for the group of numbers.

6, 10, 16

 
Possible Answers
Your Answer
Correct Answer
A)

10 + 6 = 16, 6 + 10 = 16, 16 - 6 = 10, 16 - 10 = 6
B)

16 + 6 = 10, 6 + 16 = 10, 10 - 6 = 16, 10 - 6 = 6
C)

10 + 16 = 6, 16 + 10 = 6, 6 - 16 = 10, 6 - 10 = 16
D)

10 + 6 = 16, 16 + 10 = 6, 16 - 6 = 10, 16 - 10 = 6
Practice Question
2

Write a fact family for the group of numbers.

4, 5, 9

 
Possible Answers
Your Answer
Correct Answer
A)

5 + 4 = 9, 4 + 5 = 9, 5 - 4 = 9, 9 - 5 = 4
B)

9 + 4 = 5, 4 + 9 = 5, 5 - 4 = 9, 5 - 4 = 4
C)

5 + 9 = 4, 9 + 5 = 4, 4 - 9 = 5, 4 - 5 = 9
D)

5 + 4 = 9, 4 + 5 = 9, 9 - 4 = 5, 9 - 5 = 4
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