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Q: Why is it not necessary to line up the decimal point when multiplying two numbers?

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why does multiplying numbers by ten move the decimal point to the right

It is not. When multiplying two whole numbers you need not be concerned about placing the decimal point in the answer.

You don't move the decimal point at all. You just multiply the numbers and the point should sort itself out or be put of how many digits it is to be.

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.

If two decimal numbers have x and y digits after the decimal point respectively, then their product has (x + y) digits after the decimal point.

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.

You do the multiplication in exactly the same way. The only extra thing is that when multiplying decimals, you need to place the decimal point (or decimal comma - depending on your country) in the correct position. If one number has, for example, 3 digits after the decimal point, and the other 4, you need to place the decimal point in the result (BEFORE eliminating unnecessary zeros) in such a way that there are, in this example, 7 digits (3 + 4) to the right of the decimal point.

move the decimal down and over however many numbers are behind the decimal

To multiply decimal numbers, the decimal point is ignored and the multiplication is done as though they were (large) integers. The last step is to put the decimal point into the answer by ensuring the same number of digits follow it as were following the decimal points in the numbers multiplied together; trailing zeros can be removed at this point.

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Example of multiplying whole decimal numbers: 2.37 × 3.56 = 8.4372 Remove the decimal point and multiply as for whole numbers: 237 × 356 = 84372 Then add the decimal point, thus : 8.4372

It moves the decimal point two places to the right.

You do not need to align decimal points when multipylng. You multiply the two numbers ignoring the decimal point but ensuring that any trailins 0s are present. The number of digits after the decimal point in the answer is the sum of the number of digits after the decimal points in the two multiplicands.

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There is almost no difference. The only difference is placing the decimal point.

Almost all numbers that we use in daily life are decimal numbers. The place value of each digit is ten times the place value of the digit to its right. And that is all that is required of decimal numbers. A decimal point is not necessary.

Moving a decimal point to the right is the same as multiplying a number by a power of ten. As long as both numbers are multiplied by the same amount, they will retain their same relationship.

You simply multiply the two numbers together ignoring the decimal point. You then count the number of decimal places in each of the multiplicands and add them together. In the product, you put the decimal point so that there as many digits after the decimal point as that sum.For example, to multiply 2.63 by 3.271263 * 3271 = 860273.There are 2 digits after the decimal point in the first multiplicand and 3 in the second. 2 + 3 = 5So the decimal point in the answer is placed so that there are 5 digit after it: 8.60273

yes. any thing you have on the right side of the decimal point(.) is a decimal:)

Try dividing it with a calculator. If you get numbers after the decimal point, it is NOT divisible.Try dividing it with a calculator. If you get numbers after the decimal point, it is NOT divisible.Try dividing it with a calculator. If you get numbers after the decimal point, it is NOT divisible.Try dividing it with a calculator. If you get numbers after the decimal point, it is NOT divisible.

You multiply decimals like you would a normal equation, just ignore the decimal point. So say the question is 8.25 times 3.73 you would take the decimal points out, so it would be 825 times 373, and then figure out the answer by multiplying the two numbers together. The answer in this case is 307725. Then you place the decimal point back in by counting the numbers after the decimal point. So in this case there are 4 numbers after the decimal point. then just place then decimal point 4 numbers in so your answer would be 30.7725. Or you could just use a calculator.

It is because 0.10 = 1/10 and so multiplication by 0.10 is the same as division by 10, the opposite of multiplication by 10.

When you move a decimal point to the right you are multiplying a number by 10. For example, take 3.4. If you move the decimal point to the right you get 34. This is the same as: 3.4x10 = 34. Reversing this, you are dividing by 10 by moving the decimal point to the left. For example, take 73. If you move the decimal point to the right you get 7.3. This is the same as: 73/10 = 7.3. If you move a decimal point 2 spaces to the right, you are multiplying by 100, or more generally if you move the decimal point n spaces to the right, you are multiplying by 10^n.

to do point numbers.