If two decimal number have X and Y decimal places, respectively, then the raw product (before removing any trailing zeros) of the two numbers will have (X + Y) decimal places.
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It depends on what numbers you are multiplying and how many decimals places they each have. It doesn't always haveto move to the right.
There is no difference in the procedure.
0.235 * 0.6891 = 0.1619385 What's to estimate? The total decimal places in the multiplicands is the total in the answer.
There is almost no difference. The only difference is placing the decimal point.
Multiplying decimals is when you take two numbers with decimal points, ignore the decimals, multiply the numbers like normal, and then count the total number of decimal places in both numbers. The final answer will have that many decimal places. It's like regular multiplication, but with a little extra pizzazz.