А) 399 + 26 = (399 + 1) + 25 = 399 + 1 + 25 = 399 + 26 = 425Г) 48 + 197 = (48 + 2) + 195 = 48 + 2 + 195 = 50 + 195 = 245Ж) 7499 + 137 = (7499 + 1) + 136 = 7499 + 1 + 136 = 7499 + 137 = 7636К) 2998 + 56 = (2998 + 2) + 54 = 2998 + 2 + 54 = 3000 + 54 = 3054
А) 399 + 26 = (399 + 1) + 25 = 399 + 1 + 25 = 399 + 26 = 425
Г) 48 + 197 = (48 + 2) + 195 = 48 + 2 + 195 = 50 + 195 = 245
Ж) 7499 + 137 = (7499 + 1) + 136 = 7499 + 1 + 136 = 7499 + 137 = 7636
К) 2998 + 56 = (2998 + 2) + 54 = 2998 + 2 + 54 = 3000 + 54 = 3054