Решить лёгким способом
(2,45 + о,276)+4,55 =
(12,82 + 8,394)+ 5,18=
2,53+ 15,1+4,47+14,9=
(2,45 + о,276)+4,55 =(2,45 + 4,55)+ о,276 = 7 + 0,276 = 7,276
(12,82 + 8,394)+ 5,18=(12,82 +5,18 )+ 8,394 = 18 + 8,934 = 26,934
2,53+ 15,1+4,47+14,9= (2,53 +4,47 ) + (15,1 + 14,9) = 7 +30 = 37
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(2,45 + о,276)+4,55 =(2,45 + 4,55)+ о,276 = 7 + 0,276 = 7,276
(12,82 + 8,394)+ 5,18=(12,82 +5,18 )+ 8,394 = 18 + 8,934 = 26,934
2,53+ 15,1+4,47+14,9= (2,53 +4,47 ) + (15,1 + 14,9) = 7 +30 = 37