Basic Addition and Subtraction Problems

This video tutorial for fifth graders covers lesson 14 on missing numbers in subtraction. It begins with an introduction to the concept, followed by an explanation of the relationship between addition and subtraction. The teacher demonstrates solving problems with larger numbers and introduces methods for finding missing numbers in equations. The lesson includes practice problems to reinforce the concepts and methods taught.

What is the main focus of Lesson 14?

• Geometry and shapes

• Missing numbers and subtraction

• Fractions and decimals

• Multiplication and division

How does the teacher describe the relationship between addition and subtraction?

• Subtraction is easier than addition

• Addition is more complex than subtraction

• Subtraction is the opposite of addition

• They are unrelated operations

In the example 3 + 4 = 7, what is the related subtraction equation?

• 7 - 3 = 4

• 7 - 4 = 3

• 4 - 3 = 1

• 3 - 4 = -1

What is the result of 9 minus 5?

• 3

• 5

• 2

• 4

In the equation 9 - 5 = 4, what is the related addition equation?

• 4 + 5 = 9

• 4 + 9 = 13

• 5 + 4 = 9

• 9 + 4 = 13

What is the result of 68 minus 45?

• 33

• 43

• 23

• 13

If 68 - 45 = 23, what is the related addition equation?

• 23 + 45 = 68

• 45 + 23 = 68

• 23 + 68 = 91

• 68 + 23 = 91

What is the result of 23 plus 45?

• 88

• 58

• 68

• 78

In the equation 23 + 45 = 68, what is the related subtraction equation?

• 68 - 23 = 45

• 23 - 45 = -22

• 45 - 23 = 22

• 68 - 45 = 23

What method is introduced for solving missing number problems?

• Side to side method

• Diagonal method

• Up and down method

• Left to right method