\(a)\) \(17,52+25,07+2,48+54,93\)
= \(\left(17,52+2,48\right)+\left(25,07+54,93\right)\)
= \(20+80\)
= \(100\)
\(b)\) \(18,5+17,5+16,5+1,5+2,5+3,5\)
= \(\left(18,5+1,5\right)+\left(17,5+2,5\right)+\left(16,5+3,5\right)\)
= \(20+20+20\)
= \(60\)
a) 17,52 + 25,07 + 2,48 + 54,93
= ( 17,52 + 2,48 ) + ( 25,07 + 54,93 )
= 20 + 80
= 100
b) 18,5 + 17,5 + 16,5 + 1,5 + 2,5 + 3,5
= ( 18,5 + 1,5 ) + ( 17,5 + 2,5 ) + ( 16,5 + 3,5 )
= 20 + 20 + 20
= 60
a:=(17,52+2,48)+(25,07+54,93)=20+80=100
b:=(18,5+1,5)+(17,5+2,5)+(16,5+3,5)=20+20+20=40+20=60