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How can you determine the number of decimal places in your your final answer when multiplying with deciamles?
Wiki User
∙ 11y ago
oh its quite simple, lets say you have a problem like 12.5 times 2.5 first you would find how much this is which would be 3125. then to find the decimal place, just count how many spaces are in each factor (12.5 and 2.5) as you can see, the decimal in 12.5 is one space that way <. and in 2.5 the decimal is also one space that way <. so how many spaces are there? two spaces! now we go back to 3125. if we were to place the decimal, we would first count up to how many spaces there are to the left (in this case two spaces) then we would go back to our answer and count two spaces to the left: 31.25! we started out with 3125 and to find the decimal place we started before the five and counted two spaces to the left which would be < that way! ta da!
Wiki User
∙ 11y ago
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How is multiplying two decimals different from multiplying one decimal by a whole number?
they aren't that different but the whole number needs to be converted for them to be the same
Which pattern describe how the decimal point moves when you multiply a decimal number by any power of ten?
Multiplying a real number by a positive power of ten moves the decimal point that number (the exponent) of places to the right. Multiplying by a negative power of ten moves it to the left. For example, the -3 power of 10 is 1/1000; multiplying by that moves the decimal point 3 places to the left.
What is the mathematical rule for multiplying by 10?
Multiplying a whole number by 10 adds a zero onto the end of the number. For example, 7 x 10 = 70.Multiplying a decimal number by 10 moves the decimal point one place to the right. For example, 3.75 x 10 = 37.5.
How do you turn a fraction into a decimal and a decimal in to a percent?
You turn a fraction into a decimal by dividing the top number by the bottom. And you turn a decimal into a percent by multiplying the decimal by 100.
What is the rule for multiplying a number by 10?
Simply add one ZERO to the end of the number. If the number is a decimal, then move the decimal point one postion to the right.
How is multiplying two decimal like multiplying a whole number and decimal?
Multiplying 6.7 and 5.5 is the same as multiplying 0.67 and 55, or 67 and 0.55.
Why do you get a smaller number when multiplying a decimal?
Because
How is multiplying a decimal by a whole number the same as multiplying 2 whole numbers?
It is not. When multiplying two whole numbers you need not be concerned about placing the decimal point in the answer.
How is multiplying by a decimal by 100 similar to multiplying a whole number by 100 How is it different?
10000
How is multiplying two decimals like multiplying a whole number and a decimal?
There is almost no difference. The only difference is placing the decimal point.
How do you multiply a whole number by a decimal in the hundreths?
When multiplying a whole number by a decimal with two places, ignore the decimal point and multiply as if you were multiplying two whole numbers. After you get the answer, re-insert the decimal point so that the product has two decimal places.
What does multiplying a decimal number by 100 do to the decimal point?
It moves the decimal point two places to the right.
Explain how to multiply a whole number by a decimal in the hundredths?
When multiplying a whole number by a decimal with two places, ignore the decimal point and multiply as if you were multiplying two whole numbers. After you get the answer, re-insert the decimal point so that the product has two decimal places.
When multiplying a decimal by a whole number is the number of decimal places in the product the same as the number of decimal places in the decimal factor?
Not necessarily: for example, consider 0.5 * 4 = 2
How is multiplying two decimals different from multiplying one decimal by a whole number?
they aren't that different but the whole number needs to be converted for them to be the same
How do you convert 25.4 as a mixed number?
by taking the mixed number and multiplying it by the decimal.
Which pattern describe how the decimal point moves when you multiply a decimal number by any power of ten?
Multiplying a real number by a positive power of ten moves the decimal point that number (the exponent) of places to the right. Multiplying by a negative power of ten moves it to the left. For example, the -3 power of 10 is 1/1000; multiplying by that moves the decimal point 3 places to the left.
