Analyzing multiplication strategies. Each of the following three computations uses a nontraditional multiplication algorithm to reach a correct answer. For each computation, give a rigorous (justified

Analyzing multiplication strategies. Each of the following three computations uses a nontraditional multiplication algorithm to reach a correct answer. For each computation, give a rigorous (justified) analysis including answers to the following questions: (1) Is it mathematically sound? (2) If so, how far can it be extended? (3) Based upon the skills required and not required (relative to the traditional algorithm), what motivated the approach?