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Adding Directed Numbers
Subtracting Directed Numbers
eg 2 - (-6) = 8
Thursday, August 5, 2010
Adding Directed Numbers
Our Maths lesson today focused on Adding and Subtracting directed numbers. An excellent clip describing both can be loncated at Brainpop
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Important: The second number tells us whether to go right (+) or left (−), and how many steps to move. (If there is no sign, we assume it is +).
Important: Two negatives makes a positive
eg 2 - (-6) = 8
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eg 2 - (-6) = 8
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Great work jp7! I also teach a year 7 maths and science class (in Hawkesdale, Victoria)and write a blog at http://brittgow.globalteacher.org.au
ReplyDeleteHave you tried acting out directed number on a chalk line outside? You can also try drawing cartesian co-ordinates and each student is a point on the line. Try y=x, then y=x+1 and
y=x-1. All good fun. Keep up the great work!