Final answer:
The products of the given expressions are calculated and simplified according to arithmetic rules for multiplying numbers with different signs and are expressed in the simplest form.
Step-by-step explanation:
The question requires calculating the product of given expressions and simplifying if necessary. Here are the calculations:
- -7 * 1.1 = -7.7
- 10 * (-2.5) = -25
- 6 * (-1/4) = -1.5 or -3/2
- -1/9 * (-3.4) = 0.378 or 34/90
- -3/7 * 9/10 = -27/70
- -2/11 * (-11/2) = 1
We have applied the rules of multiplication for signs: when two negative numbers multiply, we get a positive product; when two numbers with opposite signs multiply, we get a negative product. All products were simplified to their simplest form using arithmetic operations, making sure to follow the rules for signs during multiplication.