Question
Multiply 12 x 104.
- 120
- 12
- 1200
- 120000
Hint:
The values in multiplication get very large very quickly. When you 'multiply' or 'times' a number you add it to itself a number of times, for example 3 multiplied by 4 is the same as saying 3 + 3 + 3 = 12 Multiplication is therefore a quicker way of adding the same number many times, for example 3 x 4 = 12
"Powers of 10" is a very useful way of writing down large or small numbers. It is commonly called Scientific Notation, or Standard Form. In the given questions 104 = 10 x 10 x 10 x 10 = 10,000
The correct answer is: 120000
The exponents tell how many additional zeros the product will end with.
12x 104 = 12 x 10 x 10 x 10 x 10 = 1,20,000
Multiplication is therefore a quicker way of adding the same number many times. for example 5 x 4 = 20
Sometimes people use the '^' symbol, as it is easy to type. When writing, the common sign for multiplication is 'x'. In spreadsheets and some other computer applications the ' * ' symbol (or asterisk) is used to indicate a multiplication operation.
Related Questions to study
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