Образец:
\( 98 + 49 = (100 - 2) + (50 - 1) = 150 - 3 = 147 \)
\( 98 + 49 = 98 + 2 + 47 = 100 + 47 = 147 \)
а) \( 98 + 49 = 147 \)
б) \( 497 + 445 = (500 - 3) + (400 + 45) = 900 + 42 = 942 \)
\( 497 + 445 = 497 + 3 + 442 = 500 + 442 = 942 \)
в) \( 338 + 46 = (300 + 38) + 46 = 300 + 84 = 384 \)
\( 338 + 46 = 338 + 2 + 44 = 340 + 44 = 384 \)
Ответ: а) 147, б) 942, в) 384.