Solve the Decimal Equation: Finding the Missing Number in 0.1 + ? = 0.4

Question

Fill in the missing values (?):

0.1+?=0.4 0.1+?=0.4

Video Solution

Solution Steps

00:00 Choose the correct answer
00:03 Let's place each option and check
00:11 We'll use long multiplication for calculation
00:17 Let's calculate and place
00:29 We see that the first option doesn't fit, let's move to the second
00:41 Again we'll use the same method and check
01:00 We see that the second option doesn't fit, let's move to the third:
01:07 Again we'll use the same method and check
01:28 We see that the third option fits, let's move to the fourth:
01:32 Again we'll use the same method and check
01:56 We see that the fourth option doesn't fit
02:04 And this is the solution to the question

Step-by-Step Solution

To solve this problem, we need to find what number, when added to 0.10.1, results in 0.40.4. We can solve this using simple arithmetic operations as follows:

  • Step 1: Understand that the equation provided is 0.1+?=0.40.1 + ? = 0.4.
  • Step 2: To find the missing value ??, we need to rearrange the equation by isolating ?? on one side: ?=0.4−0.1? = 0.4 - 0.1.
  • Step 3: Conduct the subtraction: 0.4−0.1=0.30.4 - 0.1 = 0.3.

Therefore, the number that needs to be added to 0.10.1 to equal 0.40.4 is 0.30.3.

Reviewing the provided multiple-choice options, the correct choice is the third option: 0.30.3.

Answer

0.3

More Questions

Related Subjects

Addition and Subtraction of Decimal Numbers Decimal Fractions

Question Types

Addition and Subtraction of Decimal Fractions: Complete the missing numbers