Saturday, November 6, 2010

Karra's Scribe Post for November 4, 2010


2.2 - Text Book
Question: #16

Bella is more comfortable working with integers than with positive and negative decimal numbers. This is her way of understanding -4.3 + 2.5 .

-4.3 is -43/10 or -43 tenths

2.5 is 25/10 or 25 tenths

-43 tenths + 25 tenths is -18 tenths

-18 tenths is -18/10 or -1.8

So, -4.3 + 2.5 = 1.8


A ) Use Bella's method to determine 6.1 + (-3.9).

















B) How could you modify Bella's method to determine 1.25 -3.46?



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