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How do I use estimation to help find the product of two decimals? And what are some examples?

 Sep 11, 2019
 #1
avatar+19832 
+2

2.9  *   5.1    is approximately     3 * 5 = 15     (actually   2.9 * 5.1 = 14.79)

 

14.3 x 12.8 is about   14 x 13 =182    (actually 183.04)

 Sep 11, 2019
 #2
avatar+64 
+1

you should round to the nearest one for all of the decimals, then multiply them. the estimate should be within the same zone as the real answer. see ElectricPavlov's example for more info. 

 Sep 12, 2019
 #3
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Thanks guys that really helped!

 Sep 12, 2019

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