2 câu trả lời
`@KEm`
`78+45 = 75 + 45 + 3 = 120 + 3 = 123`
`96 + 56 = 94 + 56 + 2 = 150 + 2 = 152`
`12 + 78 = 90`
`56 + 23 = 57 + 23 - 1 = 80 - 1 = 79`
`@KEm`
`78+45 = 75 + 45 + 3 = 120 + 3 = 123`
`96 + 56 = 94 + 56 + 2 = 150 + 2 = 152`
`12 + 78 = 90`
`56 + 23 = 57 + 23 - 1 = 80 - 1 = 79`
