Prosze o pomoc w tych trzech przykładach:
a)(2,5+2/5):4całe1/7
b)10,77-0,96:0,24
c)(4całe1/2)^ - (1cała1/4)^ daje naj ;)
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a)
( 2,5 + 2/5) : 4 1/7 = ( 2,5 + 0,4) : 29/7 = 2,9 : 29/7 = 29/10 * 7/29 = 7/10
b)
10,77 - 0,96 : 0,24 = 10,77 - 96 : 24 = 10,77 - 4 = 6,77
c)
( 4 1/2)^2 - ( 1 1/4)^2 = ( 9/2)^2 - ( 5/4)^2 = 81/4 - 25/16 = 324/16 - 25/16 =
= 299/16 = 18 11/16