No, he is not correct.
<h3>
Further explanation</h3>
We can say this is a simple multiplication operation, which is one of four basic operations, i.e.,
- addition,
- subtraction,
- multiplication, and
- division.
The case we face is only a multiplication, not accompanied by another operation.
Ted said that 3 tenths multiplied by 100 equals 300 thousandths. Let's check the truth.

However, 3 tenths are a fraction less than 1 so if multiplied by 100 will produce a number that is less than 100.
We firmly say, 3 tenths multiplied by 100 do not equal 300 thousandths. Ted is not correct.
Let's calculate the correct result.

100 can be divisible by 10, or cross out zeros at 100 and 10.

Hence, the correct result is 
<h3>Learn more</h3>
- Explanations and an example of a question about the four types of number form brainly.com/question/4725342
- 10 times as many as 1 hundred brainly.com/question/572693
- What 3 digits are in the units period of 4,083,817? brainly.com/question/558692
<u>Keywords:</u> Ted says, 3 tenths multiplied by 100, equals, 300 thousandths, . is he correct, 90, multiplication, basic operations, fractions, less than 1