instead of equating cross product, a student solves
x 5
- = -
7 3
by multipling on the both sides by the least common deminator, 21. Is his apporach a good one? why or why not?
2006-11-10 09:41:09 · 3 answers · asked by Anonymous in Education & Reference ➔ Homework Help
Surely,you can do it.It reduces your head-ache of doing big multiplications and any proess which reduces your work-load but gives the correct answer is vaid.To tell you frankly,in higher classes,that is the procedure we follow to solve a problem in a quicker way.
2006-11-10 11:45:12 · answer #1 · answered by alpha 7 · 0⤊ 0⤋
It is as valid as cross multiplication. The goal is to eliminate fractions.
2006-11-10 17:49:43 · answer #2 · answered by Grover 3 · 0⤊ 0⤋
i think you need help with spelling first.
2006-11-10 17:43:37 · answer #3 · answered by lidakamo 4 · 1⤊ 1⤋