( 119 + 481 ) + 147 = 600 +147=747
(5/9 + 4/9 ) + 5/12 = 1+ 5/12=17/12
3,14+2,34+1,75=7,23
5,26 + ( 3,62 + 6,38 ) =5,26 + 10 =15,26
a) 119 + 147 + 481
= (119 + 481) + 147
= 600 + 147
= 747
b) (5/9 + 5/12) + 4/9
= (5/9 + 4/9) + 5/12
= 1 + 5/12
= 17/12
c) 3,14 + 2,34 +1,75
= 3,14 + (2,34 +1,75)
= 3,14 + 4,09
= 7,23
d) 5,26 + 3,62 + 6,38
= 5,26 + (3,62 + 6,38)
= 5,26 + 10
= 15,26
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