Don, I was using >:i.10 but 1r1+i.10 is great to change the whole table to rationals.
In the */~ i.11 times table, the largest product is 100. So when you "undo" all the pairs with division you get a huge table! I think if third grade students studied this large chart for a few months, looking for patterns, they might even learn to divide. (i.101) % table 1r1+i.10 Thanks for showing me it could be done with "table". I made it "from scratch" as they say in cooking. Linda -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Don Kelly Sent: Thursday, January 8, 2015 9:41 PM To: [email protected] Subject: Re: [Jprogramming] During lulls in the games can you simplify this code? How about this (1+i.n) u table 1+i.m this will remove * by 0 and 0% whatever as well as whatever %0 For division it might be practical to use 1r1+i.m) if you wish to stay with fractions (1+i.5) % table 1r1+i.10 ┌─┬──────────────────────────────────────┐ │%│1 2 3 4 5 6 7 8 9 10 │ ├─┼──────────────────────────────────────┤ │1│1 1r2 1r3 1r4 1r5 1r6 1r7 1r8 1r9 1r10│ │2│2 1 2r3 1r2 2r5 1r3 2r7 1r4 2r9 1r5 │ │3│3 3r2 1 3r4 3r5 1r2 3r7 3r8 1r3 3r10│ │4│4 2 4r3 1 4r5 2r3 4r7 1r2 4r9 2r5 │ │5│5 5r2 5r3 5r4 1 5r6 5r7 5r8 5r9 1r2 │ └─┴──────────────────────────────────────┘ While the table above looks good in J - it doesn't look good here without fooling around. I expect that it could be formatted for appearance. It seems to me that table as is works quite nicely except for those pesky negative numbers -something that could be left in and explained to students as something to be dealt with in the future-low temperatures or if the main floor of a bu9ilding is called level 0, first floor is level 1 -then basement is level -1. One thing that I learned when doing some volunteer tutoring is that the students who needed it the most were the ones most dependent on printed tables in later grades (they had been passed on without actually learning the fundamentals. Don Kelly On 06/01/2015 8:00 AM, Linda Alvord wrote: > Actually I am only trying to show all the facts that a student in Grade 2 > should understand and ultimately learn. > > I hope that a chart that shows all that they need to know will make the task > of learning the facts less daunting. > I'm only getting to develop multiplication and division in Grade 3. I don't > even know when they will see a negative number. Maybe the temperatures will > make them a little sooner than expected. > > Linda > > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
