Timeline for Different ways to multiply decimals
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 20, 2020 at 3:23 | comment | added | nick012000 | Yes, you've skipped steps. For instance, you should go 3.9 * 30 = 3.9 * 3 * 10 = 39 * 3, rather than just skipping straight from 3.9 * 30 to 39 * 3. The same thing with going from 40 * 3 / 4 to 30; you should explicitly note the simplification rather than skipping over it. | |
| Apr 20, 2020 at 1:23 | comment | added | Martin Argerami | No, I haven't, unless you mean noticing that $7.5=\frac{30}4$. And no one asked for a generalization, the OP clearly said this is about a talk on "how to do $3.9\times 7.5$, which is exactly what I answered. | |
| Apr 20, 2020 at 1:15 | comment | added | nick012000 | I think you might have skipped a few steps, there. Might make it confusing for students to follow. Also, you haven't stated how to generalize this method. | |
| Apr 18, 2020 at 18:36 | history | edited | Martin Argerami | CC BY-SA 4.0 |
added 27 characters in body
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| Apr 18, 2020 at 15:12 | history | answered | Martin Argerami | CC BY-SA 4.0 |