53.40‒33.4= _________________., 20.36, 20.44, 20, 17.15‒12.2= _________________., 4.17, 4.95, 4.13, 53.450‒33.5= ___________., 19.5, 19.455, 19.95, 9.3‒5.350= ______________., 3.347, 3.95, 3.353.

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