а) 43+96+57=43+57+96=100+96=196
б) 353+22+7=353+7+22=350+7=357
в) 765+208+135=765+135+208=900+208=1108
г) 144+(56+99)=144+56+99=200+99=299
Пошаговое объяснение:
оно уже в ответе
43 + 96 + 57 =
= (43 + 57) + 96 =
= (40 + 3 + 57) + 96 =
= 40 + (3 + 57) + 96 =
= 40 + 60 + 96 =
= (40 + 60) + 96 =
= 100 + 96 = 196,
353 + 22 + 7 =
= (353 + 7) + 22 =
= 360 + 22 = 382,
765 + 208 + 135 =
= (765 + 135) + 208 =
= (700 + 65 + 135) + 208 =
= 700 + 100 + 208 = 1008,
144 + (56 + 99) =
= (144 + 56) + 99 =
= (100 + 44 + 56) + 99 =
= 100 + 100 + 99 = 299
