A, 63 + 35 = 98 B, 31 + 46 = 77C, 87 - 24 = 63 D, 79 - 27 = 52C, 87 -...

Bài 5:a, 63 + 35 = 98 b, 31 + 46 = 77c, 87 - 24 = 63 d, 79 - 27 = 52e, 16 + 33 = 49 f, 50 + 20 = 30