How to Multiply by 9 Using your Fingers — The Burlap Bag
Props to my 3rd grade teacher for this one - Mrs.Wootton, if you're out there, hi. Math tricks are so sweet! This one will help you with multiplying 9 by any single digit. 9x1, 9x2, 9x3, etc etc.
Język angielski dla każdego
Po angielsku - Język angielski dla każdego. Kurs angielskiego online. Krótkie formy wypowiedzi: ogłoszenie, zaproszenie, notatka, pocztówka. Długie formy wypowiedzi: list oficjalny, list nieoficjalny, rozprawka, opowiadanie, opis, e mail, recenzja. Słówka i zwroty po angielsku. Gramatyka angielska: czasy present simple, past simple, future simple, present perfect, past perfect, present continuous, past continuous, future continuous, strona bierna, mowa zależna, czasowniki nieregularne…
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…
7.NS. 2a Rules for Multiplying and Dividing Signed Numbers | #1
A great resource to help students memorize the rules for multiplying and dividing signed numbers. Print in color on an 11x17 paper size.