directed number arithmetic sped up
the rules for combining directed numbers with addition and subtraction are probably too burdensome for memory so some awareness needs to be cultivated, over time some good graphics have been prepared by Shana McKay here and dropbox versions here many thanks to her once some facility with negative number additions and subtractions has been attained, it is desirable to move towards automating (i.e. no need to think too much) these skills this is an important step in the mathematics curriculum…
American Morse Code Art Print by Mark Rogan
American Morse Code art print by Mark Rogan. Our art prints are produced on acid-free papers using archival inks to guarantee that they last a lifetime without fading or loss of color. All art prints include a 1" white border around the image to allow for future framing and matting, if desired.
MAGYAR URALKODÓK IDŐRENDJE ÉS ARCKÉPCSARNOKA, A MAGYAR TÖRTÉNELEM IDŐRENDJE
MAGYAR URALKODÓK IDŐRENDJE ÉS ARCKÉPCSARNOKA, A MAGYAR TÖRTÉNELEM IDŐRENDJE - A magyar királyok uralkodási rendje, a magyar történelem időrendje, erdélyi fejedelmek. - Keresd:Lehoczky József:MAGYAR LOVAGKÖNYV, A FEUDALIZMUS KÉZIKÖNYVE!