Final answer:
To multiply decimals, first multiply as if they are whole numbers. Then, place the decimal in the product so that the total number of decimal places equals the sum of the decimal places in the factors. For the provided problems, the products are 14.64, -4.0672, and -0.14 respectively.
Step-by-step explanation:
When multiplying decimals, it's important to first ignore the decimal points and multiply the numbers as if they were whole numbers. Then, count the total number of decimal places in both factors to determine where to place the decimal point in the product.
-2.4 x -6.1
Ignoring the decimal points, multiply 24 by 61 to get 1464. There are two decimal places in total (one in each factor), so place the decimal point two places from the right in the product, giving you 14.64.
9.92 x -0.41
Multiply 992 by 41 to get 40672. There are four decimal places in total (two in each factor), so place the decimal point four places from the right in the product, resulting in -4.0672.
-0.7 x 0.2
Multiply 7 by 2 to get 14. There are two decimal places in total (one in each factor), so place the decimal point two places from the right in the product, giving you -0.14