Subtracting Within 20: Finding the Difference Between Two Numbers

This video tutorial introduces subtraction as finding the difference between numbers. It explains the concept using examples with cars and highlights the importance of understanding fact families. The tutorial demonstrates how to use fact families and number lines to solve subtraction problems, emphasizing the relationship between addition and subtraction. The lesson concludes with a summary of subtracting within 20.

What is the result when you subtract 3 from 7?

• 2

• 4

• 5

• 3

Which of the following is a correct fact family for the numbers 7, 5, and 12?

• 7 + 5 = 12, 5 + 7 = 12, 12 - 6 = 6, 12 - 5 = 7

• 7 + 5 = 12, 5 + 7 = 12, 12 - 7 = 5, 12 - 5 = 7

• 7 + 5 = 12, 5 + 7 = 12, 12 - 8 = 4, 12 - 5 = 7

• 7 + 5 = 12, 5 + 7 = 12, 12 - 5 = 6, 12 - 7 = 4

How can you rewrite the subtraction problem 18 - 13 using addition?

• 13 + 3 = 18

• 13 + 4 = 18

• 13 + 5 = 18

• 13 + 6 = 18

What is the difference between 20 and 11?

• 8

• 9

• 10

• 11

If you start at 5 and count up to 12, how many steps do you take?

• 8

• 7

• 9

• 6