Five balconies + Four balconies =, Nine balconies, eight balconies, six balconies, Two basements + four basements =, seven basements, six basement, five basements, six upstairs + six upstairs =, fourteen upstairs, twelve upstairs, eleven upstairs, seven downstairs + three downstairs =, nine downstairs, ten downstairs, eight downstairs, eight flats + two flats =, ten flats, nine flat, eight flats, four lifts + five lifts =, nine lifts, eight lifts, seven lifts, two towns + three twons =, four towns, five towns, six towns, nine villages + two villages =, eleven villages, twelve villages, ten villages, six stairs + two stairs =, six stairs, seven stairs, eight stairs

Math house problems

由
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