Solve the Addition Equation: Finding the Missing Value in ? + 1.2 = 2.2

Video Solution

Solution Steps

00:00 Choose the correct answer

00:03 Let's substitute each option and check

00:10 We'll use long addition for calculation

00:16 Let's calculate and substitute

00:28 We can see that the first option is not suitable, let's move to the second

00:32 Let's use the same method again and check

00:37 Let's calculate and substitute

01:00 We can see that the second option is not suitable, let's move to the third:

01:06 Let's use the same method again and check

01:14 Let's calculate and substitute

01:30 We can see that the third option is suitable, let's move to the fourth

01:35 Let's use the same method again and check

01:43 Let's calculate and substitute

02:04 We can see that the fourth option is not suitable

02:10 And this is the solution to the question

Step-by-Step Solution

To solve this problem, we need to find the value of the missing term in the equation $? + 1.2 = 2.2$ .

Let's proceed with the solution step by step:

Step 1: Write down the given equation: $? + 1.2 = 2.2$ .
Step 2: To isolate the unknown term (?), subtract 1.2 from both sides of the equation. This gives us:
$? = 2.2 - 1.2$
Step 3: Perform the subtraction: $2.2 - 1.2 = 1.0$ .
Step 4: Thus, the missing value is $1.0$ or simply $1$ .

Therefore, the value of the missing number is $\boxed{1}$ .

Given the multiple-choice options, the correct answer is option 3: 1.