Question

123+123

456+67

678+100

78-90

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Answer 1

123 + 123 = 246

456 + 67 = 523

678 + 100 = 778

78 - 90 = -12

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Answer 2

123+123=246

456+456=912

678+100=778

78-90=-12

Answer 3

123 + 123 = 246

456 + 67 = 523

678 + 100 = 778

78 - 90 = - 12