Checking Calculations Using Inverse Operations

The video tutorial explains the concept of inverse operations, which are used to verify calculations. It demonstrates how to use a 10s frame and a number line to check addition and subtraction problems. Examples include calculations like 12 add 5 and 8 add 7, showing how to reverse these operations to ensure accuracy. The tutorial also provides a practice problem for viewers to solve using inverse operations.

What is the inverse operation of addition?

• Division

• Addition

• Subtraction

• Multiplication

In the example 12 + 5 = 17, how can you verify this using a 10s frame?

• Start with 5 dots, add 12, and check if 17 remain.

• Start with 17 dots, add 5, and check if 22 remain.

• Start with 17 dots, remove 5, and check if 12 remain.

• Start with 12 dots, add 5, and check if 20 remain.

How do you use a number line to verify the calculation 12 + 5 = 17?

• Start at 17, jump 5 to the left, and land on 12.

• Start at 12, jump 5 to the right, and land on 17.

• Start at 5, jump 12 to the right, and land on 17.

• Start at 12, jump 5 to the left, and land on 7.

In the example 8 + 7 = 15, how can you verify this using a 10s frame?

• Start with 15 dots, remove 7, and check if 8 remain.

• Start with 15 dots, add 7, and check if 22 remain.

• Start with 8 dots, add 7, and check if 20 remain.

• Start with 7 dots, add 8, and check if 15 remain.

How do you use a number line to verify the calculation 8 + 7 = 15?

• Start at 8, jump 7 to the left, and land on 1.

• Start at 7, jump 8 to the right, and land on 15.

• Start at 8, jump 7 to the right, and land on 15.

• Start at 15, jump 7 to the left, and land on 8.

What is the inverse operation of subtraction?

• Addition

• Subtraction

• Division

• Multiplication

In the example 19 - 5 = 14, how can you verify this using the inverse operation?

• Start with 14, subtract 5, and check if 9 is reached.

• Start with 19, add 5, and check if 24 is reached.

• Start with 14, add 5, and check if 19 is reached.

• Start with 19, subtract 5, and check if 14 is reached.