Multiply decimals exactly as though there are no decimals either number.
If you end up with zeros on the right in your product, keep them throughout the problem.
Count how many digits are to the right of the decimal place on both multipliers, add those numbers, and make sure that is how many digits you have to the right of the decimal in your product.
Example: multiply 0.5 x 1.6~multiply 5 x 16 = 80. ~count the decimal places in the products together - 1 place in 0.5, and 1 place in 1.6 - so 2 places.~move the decimal left two places in the product - 80 becomes 0.80. Now you can drop the useless zero on the end to get 0.8.~check with estimates if you are unsure - half of 1 is 0.5, and half of 2 is 1, and my answer is between those, so I'm good. If I messed up and got 8 or 80 or 800, they are definitely not reasonable, and you should try again.
zero
Annex zeroes are zeroes that you add to a problem when the problem runs out of numbers to use.
Any negative decimal comes before zero in decimals.
Multiplying a 4 and 15 will result in 60. You just have to convert both factors into decimals.
Dividing by a non-zero rational number is the same as multiplying by its reciprocal.
Yes
why do they move the decimals when multiplying
no.
Fractions and decimals are usually rational numbers. Besides, multiplying rational and irrational numbers is also similar.
Yes.
Yes
line up the decimal point when your adding and subtracting. add annex a zero when you have extra number. sometimes you can use a number line.
0.0232
Very.
There is no difference in the procedure.
multiply
adding subtracting multiplying and dividing