Sometimes situations arise where you want to multiply a decimal by a whole number.
To multiply a decimal and a whole number, you must multiply them without paying attention to the dot in the decimal. Once you have the answer, you need to separate the whole part from the fractional part with a dot. To do this, count the number of digits after the dot in the decimal, then count as many digits to the right in the answer and put a dot.
For example, multiply 2.54 by 2
Multiply the decimal 2.54 by the whole number 2, ignoring the dot:
We got the number 508. In this number you need to separate the whole part from the fractional part with a dot. To do this, count the number of digits after the dot in the fraction 2.54. There are two digits after the dot in the fraction 2.54.
Go back to the number 508 and start moving from right to left. We need to count the two digits to the right and put a dot:
The answer is 5.08. So the value of the expression 2.54 × 2 is 5.08.
2.54 × 2 = 5.08
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