Theequivalentvalue of theexpression1.8-0.9 = 0.9Given data:The firstdecimalnumber is represented as p.The value of p = 1.8The second decimal number is represented as q.The value of q = 0.9The expression A = p - qOn simplifying theequation:A = 1.8 - 0.9On subtracting both thedecimals:A = 0.9Therefore, the value of A is 0.9Hence, theexpressionis A = 0.9To learn more aboutequations, refer:brainly.com/question/19297665#SPJ6...

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